Well, if I'm not mistaken, the NFL ticket is only in stereo. AM radio (I think) is only mono, or very poor stereo at that.
I would say that, to get the best sound quality, you start with a decent receiver and a pair of speakers. As you get more cashflow, you add on until you get a whole system set up.
$200 seems a tad slim to me, especially if you want to end up with surround sound eventually. Here's what I would go for. It offers good sound, expandability, and will be able to crank volume wise, so you can start to get the "At the Game" feel.
Receiver: Pioneer VSX-815K, $250 shipped from
J&R. You have to call their 800-number to get the best price (800-806-1115). Here's a recent
review.
Speakers: 1pr BIC DV62si Bookshelves, $120.94 shipped from
Amazon
If you think you'd eventually want more features than the 815 offers, you might consider going for a Stereo receiver for right now, perhaps an H/K off
eBay . Then later, when funds permit, you can relegate the stereo unit to the bedroom or something and get a beefier receiver with more features for your main room.