I have a 64gb 3g iPad I got delivery Friday. Has not been opened because I was away for the weekend. Now thinking about it, I think I want to exchange to the 16gb 3g iPad because I just don't have that much media (music and video) data! Would save me $200 dollars. I know I can exchange by RMA returning to Apple Online Store (it is not opened so no restocking fee) but will they let me downgrade exchange this at the Apple retail store (one near my work)? That way I would save some time with the return, mailing cost, and ordering a new model..