I'd like to light a 4x9' accent wall in my entryway with a couple recessed lights. I was thinking smaller (3") would probably look the best. Any suggestions what type fixture to use? 120V or LV? I do like the look of MR16 bulbs. I would like them to be dimable also.

The area where I need to place them is right next to the roof line so height might be an issue. All the LV fixtures look pretty bulky and are they available in remodel? I do have attic access but would prefer not to go up there if possible.

Also, I had an insulation contractor out and he said even if I use airtight cans I should still build a box out of foam in the attic and seal everything up with great stuff. Is this necessary? He said it will cause ice dams against the roof edge and recommend against the whole thing.

Thanks for any advice.