I agree that with spacers it's not as cheap as first look, but Marlin, etc have them for ~$85 a pair. Historically I haven't been a big fan of spacers, but if properly installed and maintained they have proven to be reliable. My thoughts on running Toyota wheels, probably not important to most.
It's my understanding that they are all forged making them much stronger per pound. My wheels have lots of close rock experiences so I prefer forged wheels, they are much more likely to fail by bending vs cast wheels cracking or breaking. Forged aftermarket wheels are big $$$$.
Due to rock contact the "beauty" of my wheels is relatively short lived. Shopping on Craig's List makes replacing rock rash wheels painless, cheap.
In the hopefully unlikely event of an insurance claim, factory wheels make it simple. The insurance co gets the heart attack quote from the dealer, cuts me a big check and I replace them off of Craig's List, pocketing the extra $$$.
Plus I like the style of some of the Toyota rims and they fit, look like they were designed to go on the truck.