Whatever is the cheapest out of those I guess. I think the asrock is the cheapest. The Sabertooth and V Gene arent neccessary since you arent gaming really. The MPower may be another good option. The pro is also a good option but is a bit pricier than the Asrock. The Extreme 4 has the bandwidth to suit your needs so if that is the cheapest, go for that. Well, if you have an i5 2400, then you can get a Z68 motherboard and save yourself a few bucks. The CPU you have is an older generation. The Z77 supports it, but it cant take advantage of the new tech in it, so if you can find a Z68 motherboard available in your area, get that.