I went to price lumber yesterday, and assumed I was going to go with MDF, but it's way more expensive than I remember! $40 for a sheet of 4X8! So, apparently the price of MDF (at least in my area, Raleigh NC) has gone up more that 100%. I used to get the stuff for $17!! The guy said it was due to lack of supply from Chile due to the earthquakes...OK, then. They had cabinet grade plywood, with 1 good side, and I was really surprised at the finish of the good side, really smooth to the touch, for only $29 a sheet. I'm thinking, why not go with the ply? Lighter, stronger...I mean, I like how easy MDF is to sand and finish...but for that price...dunno, any advice out there?