I hear you on the wanting to upgrade from an older bike. I am currently rocking a mid-80s Schwinn road bike. The lack of efficiency with the bike is quite astounding. I began riding it at the beginning of last year when I starting cycling to help me get back in shape. If I complete all of my tri's and du's this year, I think I will invest in a bit better bike myself, hopefully a tri bike. At this point, my legs are the limiting factor, not the bike
. Good luck with the bike search. Have you check Craigslist for one?