Z77 Mobo: Asrock Extreme6, MSI GD65 or GB UD3H?

Wanted to get the UD5h which unfortunately would not be available in my country(outrageous, really. There's no reason to specifically leave out this single mobo out of ~20 other Z77s),or the Asrock professional, but it had prices jacked up $100 locally. Again, outrageous.

So now I must either step down $20 to the Extreme6, GD65, UD3H(identically priced), or step up $100 for the Deluxe, Fatality, GD80 range boards. I chose to step down.

Other relevant specs:
i5-3570k(to OC-ed to 45x with Hyper 212 Evo)
MSI Power Edition 7850(likely to OC a little), planning to add another in 2-3 years time(or whenever it starts underperforming)
2x 4GB DDR3 (Corsair Vengeance/G.Skill Ares/Ripjaws, they all cost the same here, which I am also looking to either overclock or tighten CAS latency)

It seems that among these boards, the biggest difference would be the ALC898 on Asrock and MSI, vs the VT2021 on UD3h. Both of them are highest-tier codecs by Realtek and VIA respectively, and no amount of Googling can turn up any decent answers to which is better.

Can any kind soul here enlighten me either regarding the audio codec's performance, or highlight any noteworthy features specific to either boards? Most reviews(including tomshardware) can't give a definite answer on which is better. In fact, these 3 boards are rarely compared at all.

Thanks in advance for all your help!