I've had great luck with my refurb purchases and will continue to purchase them. It is a tough call:refurb VS New. My only thought on that one is that with the refurb, you know that Apple has hand QA'd the system. That may or may not have any bearing on whether you get a cherry or a lemon from either source.
Me, I like the refurb route better. No rebate hassles. I've had great luck with rebates, I just wonder when that luck is going to run out.