Marin Hamilton

• $495 MSRP
• Aluminum Frame EDIT: I just checked and the frame is not aluminum, it's 4130 cromoly steel.
• Durable (It comes with puncture resistant street slicks but you can throw knobby tires on it and go mountain biking, try that on your track bike.)
• I'm not sure the geometry qualifies as "aggressive" but if durability and price are more a concern this is a winner. Keep in mind that "aggressive track geometry" was designed for riders who are putting in <1 mile at a time on the bike riding circles at a velodrome. If you'll be riding on the street, those angles will not be comfortable for all day cruising.