I don't like ASrock at all.
If possible, try to buy an ASUS, EVGA or GIGABYTE mobo.
MSI, INTEL and DFI are quality mobos too.
Here you have some comparatives:http://hothardware.com/Articles/P55-Motherboard-Roundup/?page=1http://www.techspot.com/review/214-intel-p55-motherboard-roundup/http://www.anandtech.com/show/2869/1
Those OCZ modules are good enough. Anyway I would buy Corsair.
Gskill and TEAM are good options too.