We use a xerox document centre 430 at my work, we've had it for about a year now (using a leasing programme) and we've had good success with it so far. We use it for everything in our office (4 people) receiving faxes, copying, scanning, printing, and printing from AC / PM. It makes good quality prints, has a good chunk of internal memory, and duty cycle of about 120,000 pages per month. I know several others who use the docu-centre line of xerox machines and they've all been pretty happy with them. If you're looking for something to do colour work, expect to pay a few thousand more.. this one is black and white only, but it starts out at around USD5,500. Anyway, hope this imformation was helpful, good luck finding one that suits you.
cheers,
Daniel