I hate 29ers. That being said, I don't think it's proper to race on anything but 29 nowadays. Unless it's a Giant Reign. They are faster in most cases and I intend to race, sooo.
Commencal Meta 29er finally adjusted the stupid long seat tube. That bike looks fast. If pivot offered a firebird aluminum, I would consider it. I don't ride plastic, not because I think it's worse, but because I think it's worse for me.