CPU: AMD Phenom II x2 555 BE and all 4 cores unlocked (factory settings 2 cores)
GPU: Asus EAH5450/DI/1GD3(LP) Radeon HD 5450 1GB DDR3
MEM: 6 GB 1333MHZ DDR3
OS: Windows 7 Ultimate
And the others isnt so important.
So, does this setup run crysis 2 well? And which quality?
your cpu might be fine if all your cores unlock successfully. while it is true that crysis 2 is easy on hardware your graphic card is simply not a gaming card. the lowest ingame setting is high but technically there is no difference between high, very high and extreme other than frame rates. what is your resolution?
If you are fine with running the game on the lower of the 3 settings (gamer, advance & hardcore) then that 5750 might work ok but you should spend a little bit more money and get a 5770 or a 460 so you can run it at your monitor's best looking resolution, anything lower then the standard resolution might not look so good..
With my setup which isn't the best I am barely able to run the game maxed out @ 1080p and get more then 30fps but on advanced it runs fine. The game puts a lot of stress on the GPU so I would go with the step up from the 5750 if you are able to, if not then maybe overclock it but check out some benchmarks before you make your choice.
Other then that the rest of the system looks great to me as long as the cores unlock fine. My buddy just ordered a phenom 2 X2 from newegg last month and unlocked it and has all 4 cores running perfectly.