If you play on HD ofc you don't need any AA, but I hardly believe a 2 year PC can run Crysis on its highest settings on HD, simply because mine is actually 2 years old, and back when I bought it it was considered to be high-end, and Crysis only worked smooth (smooth being 24-28 FPS) on High settings. That is before all the Crysis tuners came out that made the game look 10 times better, and work 10 times smoother, which only shows how much Crysis IS actually a resource hog. Besides, Crysis itself may be strong on the tech side, but when it comes to the scenery and artistic of the game itself, there was nothing "impressive" or "breathtaking" about it, while D2 definitely has its moments. Crysis is just demo for their engine.
