If you do get these you will need different wheels which will make them stick out past the flares if thats a concern to you. If you put them on stock rims (can be done but not advised) the will rub on your control arms everytime you turn, you need to adjust the back spacing in order to keep the inside of the tire at the same distance as the stock tires are. I would suggest getting a set of 15x8's w/ 4" b.s. if you want to run those, of course you said they have 15x10's comming with them if the are 4" bs or close they will work for you and go ahead and run them.
I've heard allot of people say how bad they are, but a buddy of mine used to run them on his CJ, and he liked them, he knew they were a compromise but they were cheap and worked allot better than the street tires he had on his CJ before he got the Thornbirds, biggest thing we learned w/ them off road is to use the big side lugs to your advantage, lower your tire preasure dramatically and keep against the sides of any ruts you run. I think since it sounds like your going from street tires to these you will enjoy them offroad and find them to be a compromise on road. When you wear them out and go to something else you will have a better idea of what you want and need for tires on your Jeep, and will have a better set of tires.