New Asrock motherboard?

I'm buying one of these mobos tomorrow: ASRock Z75 Pro3 OR ASRock Z77 Pro4

Seems like a great price to me - both have everything I need. But those are low prices. I know Asrock generally prices their boards lower, but these seem like a steal. Should I have any doubts or reservations?

I don't mind an RMA if I have to - I just wish I had the option with my current mobo (bought it open-box).

EDIT - budget is >$100, and I would like the option to drop in an i5-3570K and overclock it past 4GHz in the future. But I will only ever use one GPU. Considering an ASUS B75 board, but I lose overclocking, right? Besides the +4 Turbo bin thing?