I have a razer lycosa, which looks identical to that arcosa you linked. The lycosa is nice. My favorite aspect of it is that the keys light up. Other than that it gets really dirty really easily.
I really wanted a steel series keyboard, which looks almost identical to the abs one you linked. So, personally, I'd probably get that abs keyboard. I just like the rounded look it has.
Edit: I just read the first review of that ABS. Don't buy it. "Will only respond to one keypress at a time. If you are holding down CTRL and press S, it will ignore the S. Of course, this makes this keyboard absolutely 100% worthless." That sounds horrible. I don't think I've ever even had a keyboard that does that. My razer supports up to like 4 different keys simultaneously. You'll never press that many, but it's nice if you're button mashing in WoW. I used to always make my computer beep from pressing too many keys on WoW prior to buying my Lycosa.