I just don't know what to pick, but I need more graphics power on the
smallest budget I can get away with. Can anyone say if these cards would be
significantly faster than my 64MB 8500 at modern games (Area51)?

Club3D Radeon 9600, 256MB DDR, 128bit
Sapphire RADEON 9550 - 256 MB
Club FX5200-256

Are they be in a different league, or would I not really notice a
difference?