I was using a Saffire Pro 40 for years until I upgraded to an Apogee Symphony last year. I really want to get the PCI-E card and an expansion to 16x16. I have the 8x8x8 at the moment which is great but I tend to do summing out of the box so I'm relying on a Focusrite LE Octopre for some of my outs (Apogee - lightpipe - focusrite). I can really hear the difference in the convertors but it's not financially possible to move up.
Highly recommend the Apogee. My mixing has improved a lot just because I can hear more.