Hi Everyone, I'm new here. Looking to buy a new 29er and opinions are valued. I have a 2011 Rumblefish 2. I enjoy it but never ridden anything else, RF was first 29 and first FS. I like characteristics of 29ers, climbing, etc. I'm hoping to find more nimble / controllable bike to enjoy the downhill a bit more...and tight tight switchbacks. Will I be safe/happy with any new 29er FS just from normal tech advances over 4 years? Would hate to go over 4k, open to buying used too. Thoughts?