The real reason to buy Crysis Maximum Edition!
I play this with a Xbox 360 controller I have heavily configured to be as intuitive as possible. There is no auto-aim but you can play competitively with one despite the slower turn and aim rates. I really wanted to check out a mod for this game called MechWarrior: Living Legends which was another reason I bought this game. The mod isn't bad for being fanmade. If you are into MechWarrior, check it out.
There is a steep learning curve, as there always is for these type of games but the time invested to improvement is well worth it. Overall, the MP is vastly improved improved the original Crysis and you will play this for some time to come if you enjoy these type of games and the original Crysis.