They are all pretty good (with the exception of the inkjets). I have an old Xerox 10ppm personal analog copier (XC series). Works great. Also have a Canon 10ppm (921) analog copier. Also works great. I know a couple people with the 10ppm xerox laser printer/digital photocopier multifunction machines (the ones that were cleared out for $150 at one of the office stores), and they like those too. Just check the local warehouse stores for a deal (you will eventually find one), stick with a name brand, stay away from inkjet, and take your best shot. I think I paid $249 for my 10ppm Canon 921 (fixed platen, sharp copies, no warm-up time, etc.). If you really need reviews, try
www.reviewfinder.com. I doubt you will find too many copier reviews though. One hint. On the non-inkjet machines, toner cartridges are very expensive. At least with the Canon machines, you can get around this by buying the toner from a place like tonerrefillkits.com and filling it up yourself for about $30 instead of buying a $120 new cartridge.
Good luck,
Nack