I am also looking for a day/night riding lenses. I want them to automatically switch to day/night and want them to have the foam cushion that removes and to look like regular sunglasses.
I know that a lot of folks here don't like them, but I really do love my Panoptix. They are very expensive, or at least the one's I have are. 200.00. But they do all that you are asking. I've also heard good things about the "Wiley glasses" but I'm not sure if they will change from day to night.
I picked up some at the easy rider show saturday for 20 bucks. They work pretty good I wore them yesterday when I rode in to work. The brand is VIP eyewear.
Harley used to make a pair with interchangable lens and a strap to convert to goggles. I haven't been able to find them. A friend of mine has some called badlanders but the newer ones fit much looser than the original ones.....just my 2 cents worht....Tim