If you already own a road bike look for a tri specific geometry frame, it does ease the transition from ride to run. I ride a Quintana Roo and am very happy with it. For longer ride look in carbon fiber components to dampen road vibration (fork, seat post). QR's allow you to adjust the rear wheel for tri's. Cervelo is also a great tri bike, hope this helps. Biggest issue is being properly fit, and up grade to at least Ultegra components.