Just looking for some opinions here. The last time I rode was 10 years ago, and I'm looking to get back into it. Needless to say, in these past few weeks I've quickly learned how much more advanced bikes have gotten so my knowledge is out of date. Anyway, I have a budget of about $500 and I'm trying to decide between a few bikes. I've been looking around online and stopped by the LBS. Unfortunately there isn't a huge selection right now at any of them, and I'm thinking of just ordering something online. I had a Specialized Hard Rock before (until my dad sold it for $20 at a garage sale), but always wanted a Diamondback. Anyway, I was pretty much set on the Response Sport, until I saw that the Overdrive and Topanga FS are only a little more and still within my price range. I was looking at hardtails only until I saw the Topanga FS on the Sports Authority website. I checked out a couple of threads here, and it actually got some decent reviews. I guess I was just wondering how they compare stock. I also wanted to note that whatever bike I get will end up getting upgraded based mainly on $$$ available and parts breaking.