Look into Fine Print located in Ft. Collins Colorado. They do a great deal of Fine Art printing for both photographers and Artists. Reasonable rates for quantity orders. If you are trying to sell prints in shows etc.; they are the right lab.
http://www.fineprintimaging.com/
If you need prints from slides, use Slide Printer for your chromes!
http://www.theslideprinter.com/home.html
I have gotten great results through these people, and many artists and photographers on the circuit use them.
road_runner