I LOVE LED lights! Their colour is much richer and deeper than the traditional lights. They're great on trees just because they don't heat up! We have all LED, in and outside. This year I left my outdoor lights up all year (!!) and they didn't fade a bit. The energy savings are worthwhile. If you buy just a few now, wait until after Christmas when they go on sale and stock up then.
Around here we can't even buy the old style lights anymore, but that's okay - I'm already sold.