Well, I just built up a box with the TB Catalina...I've built a few machines with the Av-710 too...and of course my own main machine has a Fortissimo III.

I can't really tell any different with the TBC vs. the AV-710. And I think my F3 is better than those 2...but it isn't by much.

I think the AV-710 comes out as a champ at it's price level...didn't see any extra value in the TBC.

Ain't buying another sound card for myself until I see what Guillimot/Hercules does next.