I've been running a custom 6.5 ROM on my Titan since May. Sprint is releasing (as well as every other carrier, I think), the TP2 with 6.1, so it would be a step backwards for me. I'm sure they'll put out a 6.5 update soon enough. But by then there should be umpteen custom ROMs available which will be tweaked and won't include all the Sprint garbage add ons.

MS.Survivor wrote How do you like the 6.5 Manila Rom?  WOrth the effort....

Sorry I never got back to you on this. I'm not a big fan of Manilla/TF2D(3D) or Titanium (the 6.5 user interface). I tried a Manilla ROM but ended up running mostly bare bones ROMs on my Titan. I stuck with UltimateLaunch, which is what I'm using on my Touch Pro2. Once in a while I'll switch to TF3D, but I really don't like having to scroll through everything.