Yeah, there are good choices out there to game on, and I think it's good that you check out all your options. It is your first PJ and you just graduated school, so this is a NICE graduation gift you are getting for yourself. Congrats!
Another thing to think about is if you are gaming alone or with others, are you watching the Movie by yourself or with others. How big a room? How much light?
How big a regular HDTV do you game on now or watch movies/football games on now?
I have a 42 inch hdtv I game on and for me, I like it about that size for MW3 or BF3 or other stuff like that, and for movies /TV shows many times my stuff is not saved in high def so having a super large screen to watch crap quality stuff on it is NOT a good experience. ON a HDTV 42 inch it looks ok. Now you could if you were on PC have multiple windows opened when using a PJ so you could adjust movie size window so it does look good if poor source, and surf the web in side window. That is cool. I have 3 or 4 windows going at one time, a few web pages open, docs, skype, gadgets like time, weather, etc. Nice setup with PJ using a PC.
Also, the advantage of bigger hdtv sizes is you can view it in any lighting situation, you don't have to worry about 4,000-6,000 bulb hours, usually you get over 50,000 hours on HDTV , so you can use it all you want.
Now where the PJ does shine is if you are playing with other people split screen or for wii, or watching a high quality movie or football game on BIG SCREEN in darker room by yourself or with others. Because it's very cool, like going to the movies. Also, a portable unit like the pro8200 and some of the others, are small to carry with you, whereas bigger size hdtv's are not easy to take with you. I am a portable gamer and it is cool to go to someones house and they play on their hdtv screen and I play on the big screen. Or we both play split screen using the PJ.
Also, how far away from the screen will you be able to sit, you got to be back further than with a 42inch screen, if too close it's too overwhelming. I don't like sitting close when I go to movie theater. I have to be about 8 feet back to really enjoy my PJ at home.
For me, it's a special experience , so I don't use my PJ that much if I'm by myself. But it is cool to take to friends home or watch with others or watch High Def football or Blu-ray movie, very cool. Thing to ponder.
Also, there are small LED PJ's , I don't know anything about them from actual use, but they have about 30,000 hours on them and are a little bit cheaper, but it may suck for gaming, I don't know and the majority are not in 1080p, 720p at best and even lower res.
Now some people are in bigger rooms than I usually am in, and a PJ would be very cool to watch all the time, and buying a bulb every couple of years is a drop in the bucket and well worth it to watch on 120 inch screen.