totally up to you, i just din't want you to be kicking your self later. i'd suggest a chaintech rather than ebay though. i don't get the rebate thing, especially with newegg stuff, i just halfed the cost of 54mb dlink system a month ago with rebates, saved like $100 or something, and i just think eVGAs a really reliable company. i can also see where ur coming from though, first you wanted to spend 140, were convinced to 160 and dont wanna be spending 184 for 2 weeks until rebate kicks in.
but watever you do, just go and kickass in games
(def. would reccomend hl2 when u can, just for cs:s if you get anything > than a 9600)