What I did 2 nights ago: purchased and assemble
Intel Core i7-860 Lynnfield 2.8GHz LGA 1156 95W Quad-Core Processor $289
MSI P55-GD65 Intel 1156 i5 i7 P55 Motherboard, with the new Intel® P55 Express Chipset, supporting Core i7 $159
Kingston 4GB DDR3 (2 X 2GB) 1600MHz CL8 240-PIN DIMM, DUAL HYPERX $110
Zalman CNPS10X Quiet CPU Cooler $60
COOLMAX 700W ATX CU-700B 120 SILENT FAN, SEMI MODULAR CABLES $ 65
OEM RADEON 4650 ATI RADEON 4650 DDR2 1GB VA4652NHG1 $80
Total cost= $840. I reuse my old case, dvd-rw, 2 HDD and existing Vista Ult OS
Despite my anxiety and nervousness I finished dismantling old box and installing all components
from 6PM to 11:50pm. When I turned the power, it booted the first time without a glitch.
I was very happy. It runs very cool. The system recognized 8 thread. Reloaded distributed computing Boinc and run World community Grid work units.
The boinc manager recognised the system with 8 thread and 8 work units were running at the same time.
I was amazed, relieved of anxiety and very happy with my final choices of components. I do not OC and do not play Games. Usage is Internet browsing, email, photo edit, mp3, MS excel and word etc.
I am just sharing my successful build and may help someone else with components.