I use a DA-7 all the time for projects and I cannot recommend it higly enough. Compared to all of the other low-priced digital boards out there, it really sounds good.
Its pluses: Good analog front end, with decent 24 bit converters, Easy to route anything anywhere. Decent EQ, usable (but not great) compressor, but with routing, you could easily patch in any other outboard gear without problems. Good automation that can chase really crappy signals coming into it...
Minus: Compressors aren't fantastic, but usable. No internal reverbs, etc... BUT I patch my Lexicon in off of the digital aux sends/returns. Aux 3-4, and 5-6 analog sends and returns on single 1/4" stereo plugs.
--Ben