Which one are you thinking...
-AND-
Which Epson 'engine' is it using... if it's a x900, you may want to reconsider.
We have a I-Image slant model (7900 'engine') Ours is in our 30-35% RH, 75-85 degree screen room and wet screens do go in there... but, we've had no problems with print heads clogging or needing to do power cleans... we do baby it tho... (nozzle check every day, try to use different print heads different times of the day and days to keep them all moving). I have heard others that haven't been so lucky with clogs...
Just realize that the Epson's do have their quirks (cartridge resets do come to mind as well), but if you baby it and are willing to deal with it, there are good deals to be had.
-J