Okay, so i've been doing spinning class for well over 2 years. I would really like to buy a road bike to actually move when I pedal. In any case, does anyone have any good suggestions as to a beginner road bike? I don't want to spend more than maybe $400. I'm trying to find a good type of bike for me, then maybe purchase on e-bay. Also, i live in New Orleans and it is INCREDIBLY hot right now, so I want to make sure i'll actually ride the bike before forking out the cash for a really good one. Also, what size? I'm 5'5". I think my last bike was a 19".. does that sound right? I appreciate ANY help.