Asus boards seem to have headers for USB3.0, and then it's up to the cases to support it; which is more important actually. You can get this card, but you still hook it up to a USB2.0 board on the case's front panel. These cases are rare still it seems. I just happened to like this one Lian Li (
PC-9F) and it just happened to have USB3.0 available on the front panel. Other than that, I'm thinking it's down to no more than 5 cases as a whole.
However, the bay device is an option as you've seen. We have spare bays I suppose; but did we update to eS/ATA with an add-on card and a bay device for the long term? I'd rather have USB3.0 virgin on both the board and the case. Just my opinion. Heck, I have USB3.0 on another computer and still don't have something to hook up to it.