At newegg.com, there's 9800 Pros for less than that, and a GF6800 for $254 (OEM).
I'd personally look at: Radeon 9600 Pro < Radeon 9800 Pro < Geforce 6800. Anything higher is more pricy than $250. I'm also not positive of how well the 6800 performs with T:V. I know that the x800, unless you have the weird problems with it, tends to perform extremely well. However, that's over the price limit you gave there.
My 9800 Pro handles the game quite nicely, on ultra-high for most everything (not textures, bumpmaps, since it's a 128mb card) and 1280x1024, I think I keep 40fps +, even when there's a fair amount of action.