I can see either option working. I would check to see whether one option of the other will restrict you to using smaller wattage bulbs that might not be bright enough. If that isn't an issue, I'd guess it comes down to cosmetics.

We bought the Juno IC926 sloped ceiling housings. They are solidly built and you can insulate right up to them. They are also sealed so they will keep air from leaking through the ceiling. You adjust the bulb socket to point the bulb straight down depending on the slope you have.

Most of all, I bought them because I don't care for the look of eyeball lights! (lol)

Holly

I agree with dreamer, the eyeball solution places the bulb (about) at the drywall level which can be glaring and obnoxious, IMO. The JUNO 926 or equivalent route recesses the bulb into the trim and is the better way to go.

If you search back, there has been at least 2 other threads on this exact subject in the last 2 weeks.

6" eyeball cans will limit you to 75 watt bulbs. sloped cans will take up to 150 watts. 150 watt bulbs will produce a lot of glare unless you have a very high ceiling. You'll probably end up using 75 watt bulbs regardless.

sloped cans are also about 3 times the cost of regular cans with eyeball trim. I went with the eyeballs and they look fine.