I do ride with a chamois. But if I didn't, I'd be tempted to try one of Serfas' dual density or maybe a dual density with memory foam. They advertise a 90 day comfort guarantee. BTW-on my road bike, I'm using a Serfas Dorado (older model tho), and while I like it (as said-I do use a chamois), don't think I'd recommend it without one.
Men's Archives - Serfas