I would avoid the 333 like a plague. I had purchased mine from a dealer (demo unit). The caps blew 5 years later, sent it back to Madrigal and they got it fixed under warranty. Only had to pay shipping to send it to Madrigal. ($200 +/-). 3 years later, the caps belw again. I spoke to the tech guy at Harmon, he told me that he checked the history on this unit and apparently it had two cap replacements. The first time was sent in by the dealer. Since it was out of warranty, it cost me over $1300!
It did sound better after the cap replacement, but I traded it in for a brand new Pass X350.5. I would never want to live with the fear that the caps would blow any time.