If you already have decent/good pres, get hold of a Tango 24 by Frontier...limited to 48K, but sounds MUCH better than many popular units running at 96K...even if you don't, get one anyway...you will not be disappointed.
I second the RME ADI-8. I ran two ADI-8DSs into my 9652, it was the most stable system I ever ran (was running Nuendo at the time.) Sounded great. Now that I'm running an 002 rig, I'm selling one of my ADI-8DSs in the classified section, if you're interested.