Bike Forums - Greetings

Am new to your site and am pretty green when it comes to cycling. My daughter rides a lot and she's talked me into buying a nice road bike so we can ride together. I'm just reading through the many posts here to get an idea of what i may want to purchase in the future, 'lurking' i guess you call it. I do have another reason for signing up though. My daughter's Giant RS950 was stolen a couple months back and I'm trying to locate a replacement for her. So if any of you know where i might find one (hers was a 50cm frame), PLEASE let me know-- I'm in Florida but will happily pay shipping expenses. Also any suggestions for me on where to start for my own bike. I'm 51, in excellent shape, am 5'10" and weigh 152lbs. Will be using the bike mostly for in town riding (Gainesville, FL). Thanks!