You of all people know you like the Cobra R better. This isn't even a question. Hands down no doubt about it you want those 18 inch cobra R's. The Saleens look great too....but you already have a set.
Best option for you is a set of Saleens on one car, set of 18 inch R's on the other. Then you can go back and forth when you get tired...and they both look great (but the R....hands down best looking wheel ever built in the history of the planet and you know all this already)
PS. I'll still be rocking some massive 20's and getting the ladies though.