I totally love my Ibex Kilometer II gloves. Breathable enough for 60°F, warm enough for 30°. That's really important in spring and fall when the temperature might easily reach both of those on a ride.

They're "unisex," which in this case means a true compromise - I can't wear men's gloves at all, but these are close enough.

You might check out the rest of the Ibex catalog too, the Kilometer gloves are synthetic palm, but they have a couple of gloves with weather-resistant leather palms that might work on the bike, too.