I want to get a good hybrid bike in the $600-800 range. Is that possible? I used to have the Jamis Allegro 2 2008, but it was stolen. Now I'm caught in between the Sirrus Sport and the Allegro 3, and really don't know which one would be a lighter, better bike, or if there isn't really much difference. The bike shops around me don't have them in stock (they have to order them), so I can't test ride them before buying... Help!