I love my p45's! I haven't actually seen anything wrong with any rotas, only posts about people saying they 'had heard' this and that. Rota and suby/wheeldude.com joined into a few threads and posted some lists of competition cars that ran Rotas. Just my $.02
I run the P45F's on my car. They are very similar, just not as concave. 8.5" wide vs the R's 9.5. Rota is making a 10.5" wide rim now for the X, you should see if one of those would fit