If you're willing to sacrifice some sound quality the Zoom R24 is
a viable 8 input interface.
Bonus is it can be used stand alone, has built in effects, and can be used
as a control surface - but you not going to get 24/192 out of it, which
most don't use anyways...
In stand alone it only goes to 48khz I believe, but as an interface it goes
to 96khz, which is as high as I go on my Quad Capture anyways...
The Pre's are definitely not in the same league as the QC's...
But you'll get the best of several worlds for the sacrifice...
If you want QUALITY and inputs then I'd recommend the
Track16 by Motu...it's in a better price range...
Latency is decent on all these...
It just all depends on what you want out of it...