whats the pros and cons i currently have a 29er and don't know what to make my next bike
I've owned two 29er's over the last 5 years, my current ride being a Trek Superfly that I love. One of my riding buddies picked up a fat bike about a year ago and kept raving about how awesome it was. I finally broke down about a month ago and picked up a Trek Farley (fat bike) full rigid. After 5 rides and 100 miles at various parks (Allaire, Hartshorne, Six Mile, and Round Valley) I have to agree, the fat bike is awesome.
I love both bikes for different reasons. The 29er is like the F-16 of the trail, light and fast awesome for tearing up nice flowing single track. The fat bike is kind of like a monster truck, able to smooth over rock gardens and climbs like a mountain goat, making shitty rooty and rocky climbs I've never cleared on my 29er hardtail seem easy. This simple analogy doesn't do the fat bike justice, it's also awesome at tearing up smooth, flowy single track like Six Mile and Allaire, but it's not quite as nimble as the 29er. That being said it's still very capable handling those types of trails.
Bottom line: I wouldn't say I would replace my 29er with the fat bike, but if someone held a gun to my head and told me I could only keep one, it would probably be the fat bike. It doesn't do everything as well as the 29er in all situations, but does everything well enough. I don't think the same thing can be said for the 29er, at least not a hardtail, IMHO.
As I'm finishing up my post, I noticed you posted up and said you didn't want a fat bike.....oh well, you have my take anyway