What would be the best graphics card for my computer?

sorry man there is no way you can handle crysis on your currant rig. 150 dollars will buy you a decant graphics card that will play crysis but not on max settings. also you processor is slow so it will bottleneck you graphics card. the card will push out more then the cpu can handle. also you power supply is tiny. it cant handle most of the graphics cards on market right now that are able to handle crysis. lastly your ram is sub-par you would want atleast 6 gb you only have 3. your aging/ low end rig cant handle this. if you really want to play crysis, get more ram,a bigger psu and a radeon 6850 and you might be able to play on medium and possibly high. crysis is a very demanding game you need a powerfull computer to play it. the game will crush you computer man trust me.