I always get mine at Wally World... just use the handy dandy little computer they have hanging in the spark plug isle. Choose between the brands then just find the pack. I then check the gap on them just to make sure (All of the 4.0L OHV's, the 4.0L SOHC's, and the 5.0L V8 share the same gap. Its .054)
I've used Bosch Platinums and Double Plats, no dif except in price.