Congrats and I know how it feels for your shipment to come at the end of the day. Happens to me too but that's only UPS. FedEx can come anytime so I had to be here and if they shift over to the USPS then I'll know when to expect it.
I don't see any problem with MSI motherboards and I've read a lot of folks like 'em. I have one that's still working, an AM2 board (K9) with the X2 3800 CPU.
By the way, my sis has my old K8 board, still working.