Rather than go for a new bike just now, I've decided instead to build "Frankenbike" to ride until I lose enough weight to do otherwise.
My components were all chosen for durability rather than light weight. They include:
Ross "Super Grand Tour" chrome-molly frame & fork
Alex DA-22 "V-rims" with 36-spokes per wheel
Specilized "Turbo Pro Cipillini" tires at 26mm width (& up to 120 psig)
7-speed Shimano drive train
The usual brakes, bars, post, seat, pedals, etc.
This will keep me in front of my friend who just bought a Cannondale R-1000, and thinks that his expenditure has turned him into "hell-on-wheels" <G>!
If anyone has any durability suggestions to add to this machine, I'd be interested in hearing them. Obviously, since this is a temporary machine, I'm less than interested in spending any significant amount of money, but if reliability can be enhanced inexpensively, please clue me in.
Thanks for sharing your experience!