Butch,
We bought ours at Best Buy several years ago. This was our first flat screen TV. We determined what size screen we needed(42") and just looked at all the 42" ones on display and picked the one that looked to us like it had the best picture. We got an LG, not the most or least expensive, did not really look at the prices to start with, but this one was as good as any we looked at. Not a minute's trouble since we got it in 2007. We got an LCD, there were some issues with Plasma back then, but I think that has been resolved so just a matter of what looks right to you.
Since you had a console you did not have High Definition so you will be blown away with the picture. If you have satellite TV(like us) you will have to change your receiver to HD and pay a little extra but well worth it. Don't know about cable and HD.
SeaRay
Mark 1:17 ...I will make you fishers of men