I have the MY16-AT / ADA8000 combo currently
Thinking of going to the MY8-ADDA96 in order to not have to carry an external preamp/small rack.
16 channels almost always gets the job done. Add 8 channels via the analog card and you can handle the IPOD/CD/computer input, talkback input, and an extra input or 2 from the stage if necessary. Gets the job done with less baggage.
Ideally, I'd just get an LS9-24 (if only they would make one!)
The LS9-32 will handle everything I do, it's just too big for the majority my one man club-world gigs.