Has anyone ridden one of these HASA bikes? I'm trying to find something under $300 and am thinking that this might be a good value. My other option is a used Raleigh Twenty for around $250. Also I've seen used Dahon Boardwalk and Yeah bikes for around $200. I want something solid, dependable, and fun to ride aggressively. Any advice on pros and cons of these choices would be much appreciated.