Looks pretty good for the parts you selected, except the HEC PSU. I prefer: Corsair/Antec/PCP&C/Seasonic PSU's, because of quality and warranties. Could you send me a link to that PSU??
I'd also consider AMD 4890/5770 over the nVidia gtx260 216 core GPU, but that is just me. I don't know if they are the same price or better.