We bought our 2006 Crescendo brand new. It's 8 years old now, with 68 k on it, so the wife and I decided that maybe it's time to trade.
I stopped at the Camping World in Garner, NC yesterday to pick up a couple of led bulbs, and while I was there, I decided to walk through their display coaches to see what might make me want to part with my hard earned money. The conclusion I came to is "not much."
There are some nice bells and whistles on the newer coaches, but unless one is ready to spend upwards of 300k, I really don't think there's much to get excited about out there. It looks like maybe the best thing to do it to do some upgrades and stick with it for another 8 years!