Here's some pix of my X with American Racing Wheels called "Fuel" that fit without spacers.
Only bad thing is that you have to go up to 17" for these. Size is 17x8 with 5.5" of backspace. Tires are BFG-AT-KO 265/70/17
ARW website lists offset as +25 on these wheels. The product # is 321-7868. My Xterra is an 05 (S) model 4X4 and the wheels just bolted on with no need for spacers or adapters. If you get these wheels you will notice that the calipers are VERY close to the back of the wheel, but they do not rub. I've been runnung these for about 1,200 miles now with no problems what so ever.
Wheels come with center caps but you will have to buy the lug nut kit which comes with a long socket to fit down into the wheel because of design.