1. 9500-- No. Not enough of a jump to be worthwhile. Also your power supply is not up for any upgrades.
2. If you want anything better you will need to upgrade your power supply--which is nearly impossible in a tiny case.
If you want to play Crysis the minimum upgrade you are looking at is a $20 case, a $40 power supply and a $80 card. While it seems intimidating--all this would really involve is a screwdriver--you should consider it.
+1 as Case and Power Supply Limits you.
With a 80$ card you'll be able to play all games at 1650X1080.
But opening the case will void the warranty