It's hard to find curved training shoes anymore (for that matter, even racing shoes). Diadora training and racing shoes are curved, buth they are hard to get in the states. Some of Puma's shoes are curved, but they are a bit too narrow for me. New Balance's models are mostly straight, as is most of Asics' line. Some of Sacony's training shoes are curved (Ride), but their racers are straight!!!! Anyone have experience with a brand where both the trainers and racers are curved in the forefoot?