If the room is large, you could do a corner fireplace and it would be cozy, but it does eat up lots of space. Also, you have to consider the traffic pattern in the room, so you dont' have people tripping over the hearth.
Pretty much any design show on TV doing a reno on a den or family room will include a TV over a gas fireplace insert. They don't specify if they are installing LCD or plasma TV though.
I understand that plasma TV's run hotter, but maybe they're able to withstand more heat. Perhaps LCD's might be better because they run cooler and therefore can tolerate more heat.
Must be someone who's installed dozens of these things or had to service units that have been installed for a couple or few years now.
I've installed several hundreds of these things. I would have to say based on my experience it honestly doesn't matter one or the other.
Reasons why you would want to consider a plasma or LCD….
1.) Does the room have a bunch of natural sunlight comming into it? If so LCD is better because it uses a backlit technolgoy meaning that its pushing light through the screen so when the sun hits it you don't get a washed out affect.
2.) If you don't watch much TV in the day time then Plasma is better because it has better black levels than LCD. Blacks look black not grey like they do in LCDs.
If you just want the best go with LCD. You can get a 1080P LCD for a fraction of the cost of Plasma 108OP set. Twice the pixels make for a very nice picture.
Here is an article on putting your tv above a fireplace.
http://hdinstallers.com/fireplacetvinstallation.html
Hope that helps.
There is also a odor, almost like when you turn on the furnace for the first time.
The popping sounds stem form irregular power flow. Check the amps coming into your home. If my hunch is right, other appliances of yours may be in grave danger. No need to mention fire hazard
LSU AgCenter . ListPlans to build two outdoor fireplaces or grills, one made of stone and the other of concrete … Plans to build stone, brick and concrete barbecue grills. …
www.lsuagcenter.com/en/our_offices/departments/Biological_Ag_Engineering/Building_Plans/recreation/ - 98k - Cached - Similar pages
Without knowing the specifics of what you are searching for, this seemed a good guess. Good luck, hope you enjoy it…nothing is as cozy as a nice fire!

What followed the invention of fire? The party. That’s because once man had a warm, inviting place to gather, everyone wanted to congregate in his cave. Not much has changed today except the quality of the fire pit. This one is made of heavy-gauge solid copper by artisans in Turkey and features a stylish hand-hammered rim and rolled edge. It sits securely in a cast iron stand and can safely withstand high heat. The cast iron grill is ideal for rustling up dinner as well. Measures 24″ x 12″ high fully assembled. Note: Due to the size of this item, we’re not able to offer our red gift box. Shipping details: A $10 shipping surcharge will be added to this product at checkout. Copper fire pit lid and spark screen also available for purchase separately. A great gift idea from RedEnvelope.

Classic Flame Built-In Electric Fireplace with EZ-ACCESS front serviceability feature. The top EZ-ACCESS Panel simply unlocks and flips down to expose all parts for complete front visibility. When service is complete just lock the EZ-ACCESS Panel back into place. This EZ-Access feature makes ClassicFlame the easiest units to install or service of any electric built-in fireplace available. Zero Clearance Design Sculpted brick interior Double glass doors with decorative screen Realistic flame effect Floor mounted ember bed w/hand carved glowing log set Operates with flame only and flame with heat EASYACCESS front serviceable Durable and attractive powder coat finish Integrated junction box with punch outs for hard wired installation User friendly controls Can be wired for 120 volt (5,000 BTU) or 240 volt (9,200 BTU) service On/off remote control included Dimensions 38.7″w x 32.7″h x 15.3″d Viewable Area 36″w x 27.2″h Call 509-993-0748 or email West Furnishings for special discounts on this item.

Fireplace screen with cast iron medallion. Black metal. 44 1/2 x 1 x 30 3/4 high.
This program is designed to teach students the knowledge and skills necessary for job entry in the field of bricklaying and masonry. The Bricklaying and Masonry Program prepares graduates to work as brick or block masons for both residential and commercial construction. The emphasis of the program is on learning proper building techniques and procedures through hands-on projects. Students mix and spread mortar, lay brick and block, level, plumb, in-range, and build corners. They build walls, arches, and fireplaces. Students also take courses in job-related math, communications, plan reading, estimating, and customer and job relations to compliment their skills.
Duration : 0:0:59

www.axellandscape.com