I can't say anything about Octa-Capture, however:
I can really really recommend babyface! ..Or rather.. I really recommend RME as a company!
Last week I had to replace my old RME HDSP9652 (PCI) that I bought in 2004.
The reason for this was NOT that it's not supported anymore.. They still update the drivers for it!! (!)
The reason why I had to update was that I also bought a new motherboard and I couldn't find a motherboard I wanted that also had a PCI-slot..
And since I loved the stability and reliability of my old 9652-card so much I replace it with the RME HDSPe RayDAT (which basicly is an updated PCIe version of the 9652) When investing in an RME prduct you can be sure you'll be well taken care of as a customer! They won't forget you after their next audio-device release (as many other big companies seem to do)