Anyone running Ravine wheels with spacers?

I'm running 15x8 Ravine wheels with Cooper STT 31x10.50x15 tires. I love the look but it really bugs me that the tires sit in too much when they should be flush with the fender or stick out a bit more.

That being said, is there anyone running Ravine wheels with spacers? If so, what size spacer are you running? Pictures would be awesome to!

I am thinking that 1.5" spacers might be alright but I don't know if thats too much.

Typically 1" or 1.5" are used. Stock BS for XJ wheels is 4.5, rec BS for wider tires is 3.5-4". I would go with 1".
I have 31x10.5 MTR-k on my heep with ZJ Canyon wheels, same BS as XJ. I like the fact that they stuff better, but that is my personal opinion. Are you trimmed/bumpstoped already?