I dont see the point in going crazy on rear brakes. 70% of ur stopping power comes from the front brakes. Looks expensive and won't really do shit to slow u down any better than stock. Unless ur doing it to lose weight.
They do dress up the rears, if you have Wilwood fronts. I have Brembos (red calipers) front and rear on my G-70, and I like the match vs. Brembo fronts only with generic looking rear brakes. But, as Brett points out, performance wise you're not really gaining much with the Brembo rears. If you're doing it primarily for appearance, then you've already justified the cost. They do look nice.
They do look pretty no doubt Bob, especially if u have them open rims. I do see a lot of Corvette guys with them I guess. Just seems like a waste of money but shit im sure ive wasted more on my junk so two each his own.