Presently have an opportunity to trade my 5900XT (stock @ 400/700) with a MediaMax 9800Pro (stock @ 380/680). I still have abt 2 yrs 10 mths of warranty, while the other guy has 1 yr 8 mths left. Since the price difference is ard 80 bucks (for me at least), what is the most worthwhile amt for me to offer him as topup, 40 bucks or more..? (Or.. Should i just keep my current card?)