Starting with the crysis question first. As long as you get a smoot frame rate (min 25 FPS) for the game to be playable. Your results seem to be above this figure. Are they minimuj or average figures ?
Trendsonic is not a name I am familiar with, andwould recomend you stick to Corsair / Antec etc.
Excluding the PSU only item i would change is the HDD - 320gb may seem a lot of storage but once the driver gets to around half full the performance will drop off. Seeing as HDD's are getting cheaper all the time (Spin Point F3 in the UK = £49) the bigger the better.
3dmark benchmarks are purely synthetic benchmarks with little or no real world performance indication as to how well you PC will perform.