the 750 watt psu is overkill for what the system has.
400 watt should be plenty (unless you plan on upgrading anything later)
heres a better processor for the same price (and a more reliable reseller)
Newegg.com - AMD Athlon 64 X2 5000+ Brisbane 2.6GHz 2 x 512KB L2 Cache Socket AM2 65W Dual-Core Black Edition Processor - CPUs / Processors
use coupon code CPU628 to make it the same price
the HDD is nice for the price
the case is far too much. There was recently a deal with this exact case and 400watt psu for $69 shipped on fatwallet
thats about all i can comment on