I've been really happy with my Roland QuadCapture but will soon be receiving a Kronos 2 and I'll want to feed all 6 outs to a sound interface so I am thinking about the OctaCapture.

What other interfaces would you recommend over the OctaCapture and why?

I have an Octa-Capture but upgraded last fall to a Studio-Capture as I needed more than 8 inputs at times.  I could have daisy chained two Octa-Captures together but I went for the Studio-Capture.   
 
But, I liked the Octa-Capture and Craig Anderton wrote a glowing evaluation (next best thing to girls  LOL) on Harmony Central.
 
Prior to the Octa-Capture, I had a Focusrite Saffire Pro 40.  The Saffire Pro 40 gets good reviews and I thought it was great.  However, the Octa-Capture's preamps are as good or better and the Octa-Capture's Limiter function is a plus. 
My Octa-Capture worked on both Win 7 and Win 8.1, however I had to get the updated Win 8.1 driver from Roland.