Thanks for both of your responses.

Someone at a local store was recommending the WAC Charge with a replaceable bulb -- I'm worried with such a small fixture it wouldn't really be able to give much more than the spotlight effect? But it seems like there are wide-flood MR16-style lights (at least that go to 60 degrees?) It's hard to see the effect in a lighting store. The fixtures themselves do look a lot more elegant in my opinion than some of the universal ones which can hold an e26 lamp...

re: dimming -- is the benefit with integrated LED compatibility with more dimmer switches?