For simple stuff that really doesn't require good
paper, I have a roll of 30" white butcher
paper. Works well with my Roland CX300 and I don't get any wrinkling. I slow the unit down a lot though, or pull the entire length of
paper I need to draw off the roll, as the roll is way too heavy for the machine to pull it off on its own.
IIRC, the roll from my local
sign supply was around 100 bucks, and I think its a thousand feet, the roll has got to be at least 18" round!!!
Chris