I highly recommend the confetti cut Fellowes DM15C if you can find one, but it's no longer made, I bought mine several years ago, it's still running fine. Burning isn't an option here, so the shredder gets used a lot, it'll gobble up whole junk mail credit card offers as fast as I can can feed them and it never complains or slows down, the only maintenance is lubing the cutter head each time the 10 gallon bucket is dumped, got mine on ebay for $115 shipped. Sometimes the feed sensor gets dust on it and it doesn't auto shut off, but that's an easy fix by blowing the dust off.
Tim