For power supply reviews see here:
http://www.jonnyguru.com/index.php
For GPU reviews see here:
http://www.tomshardware.com/reviews/...card,2857.html
I assume that you will mostly be running this sim (iL2 or COD) on your new PC. Consequently I would advise you to buy the faster CPU you can afford, even if it means buying a lesser video card/PSU (but don't skimp to much on the PSU, cause a blown PSU can cook some of you precious hardware...)
Flight sims a veyr CPU limited, so it make more sence to drop the bis $$$$ on this item...
Regards,