Here's one discussion about the two cpus: http://www.overclock.net/t/1088649/g620-vs-phenom-ii-55.... If you want Ivy bridge, why not just wait two months for it and don't order anything yet. Some boards may get bios updates for it and some won't. I never trust Intel for using old chipsets for new cpus; the old ones may work but they may have a better one out by the time you order IB.
Yes. Either asus or Intel should work fine. Try getting a z68 board if you can budget for it.
Outta my budget... Board alone costs $150 ... moreover not looking to use the CPU-GPU thing .. that's the reason I am looking at the p67.. almost all the features of the z68 except the onboard graphics..