mine was also a conversion... it treated me veeery well up until the time it was stolen, but by that time I had gotten a bunch of new parts - wheels, cranks, bottom brack, chainring, etc. It's very possible to get an older used road bike though and convert it and have it ride like a charm, I'm sure.
I also hear that the Mercier Kilo TT bike is a really good and solid bike for the price. I believe you can get it on bikesdirect or one of those similar websites.
My original gear ratio was 42/16, which was pretty easy, and so going down hills was kinda ehhhh.... I eventually went up to 47/16, which I loved. Downhills were great but uphills were slightly more challenging - but I was fine with that, because it wasn't impossible (walked a few hills on RR loop though hahaa). If you get a new bike it will come with whatever ratio. Chainrings aren't overly expensive so it's easy to experiment with different sizes-- maybe somebody has extras lying around that you could borrow to try out. You'd want one somewhere in the middle probably, but it really just depends on each individual
Good luck --- hope you luv it if and when you get one
