OKAY, since you asked for opinions, I have a couple.
1. If it's black rims you want, HAVE THE STOCK PAINTED/POWDERED.
2. The design of the rims you showed look nearly identical to the stock, so if you're stuck on getting a new set get a set of black older style GT500 rims for cheaper than the Steeda's, and once again nearly identical to those pictured. See Cruizin Concepts website, a forum sponser even.
3. As far as the rims shown, I'm sure they're fine, but not sure anyone would notice much of a difference for the money you'd spend, unless you just have a lot of extra $ laying around (in which case, can you send me some?).