Xenon is likely going to be as hot as a halogen, and is filled with that noble gas, rather than one of the others typically used in a halogen lamp.
LED is more efficient, but you must be careful about color temperature...finding one that is not going to look blue is harder.
Had you considered a mini track? You can choose various fixtures for those with various lamps. Cheaper when it comes time to replace the bulb, and some of them are rated at upwards of 10K hours. This is what I have, and have it on a dimmer. Leave it on most evenings at a low level so foraging in the kitchen is easy, but doesn't use much electricity. The bulbs last longer when not at full bright, too. Going on 8-years, and have one bulb that needs to be replaced out of 10 or so. I think I bougtht a few extra, but not sure where they are, so I'll need to probably buy some new ones. It's easier to space them to get the lighting you want, too, since you can move them anywhere along the track. You can use different lamp holders, too, to highlight something as well, if desired. The track I have with the small lamp holders fits entirely within the lip of the upper cabinets, so unless you are sitting down, you don't see the individual lamps.