spring for a road bike, join a roadie club
that's what i did...
and have been riding solo and on fun and fast groups rides.
i really dig the full-on road bike experience. (no worries, mates, i'm still a mtb nut)
whew! road bikes really fly down twisty mountain roads, leaning over at 30+ mph on some turns, what a blast!
and all that hill climbing on 53/39 x 12-25 road race gearing: ouch, but it's good training.
the road training's good 'cause i'm pedaling much longer sprints than on my mtbs.
now i have a sub 20# (with time atac pedals) Campagnolo 2003 Chorus/Centaur Bike Kit 20 speed (double ring crankset) Viner frame made with Dedacciai EOM 16.5 steel,
www.viner.it
Viner road frames weights 2.8~3.4#s and its Dedacciai EOM 16.5 steel are among the lightest and stiffest tubing. I paid less than $2k from
http://www.gvhbikes.com/.
My Viner looks great, rides super and the racy geometry makes quick leans and turns.
i did consider a Trek 1500, 2100 and the Trek 5200 (all are terrific, but i wanted steel and Camy gruppo since my steel Kona mtb has Shimano gruppo).
I also consider's a cyclocross, but my light mtb could handle croos, if needed. and also i want to try road races and road crits, all really to enjoy myself more as a xc mtb racer