I have the Toyo Proxes-4 now, and I don't like them that much. I prefer the Dunlop Sp 9000 I had before (came with the car).

I'm gonna try out the T1Rs next, I heard good reviews from my friends so I'm expecting them to be better than the Dunlops.

I don't know how good the SP5000s, but the SP9000 > Proxes-4 IMO.