OMG... if you guys are not Ti gurus.. I don't know of any others that is as informative as you all.

My buddy recently bought a Litespeed T1 frame, which is listed with 6/4. Not bad for $2K on a 2014 model from fleabay.

I on the other hand don't have that much and looking at the Motobecane Le Champion Ti w/ 3/2.5. I weigh about 148lbs and like to hard sprint on flats and occasional standing attack on climbs.

I use to have an aluminum frame and that flexed a lot, but it probably cuz it's a cheap frame. But would hate to have that flexy feel on the bb part when sprinting or out of saddle climb.