Moreracecar, is your main goal more grip? In case it is, I am extremely familiar with those tires. I would not use them. Believe it or not, due to construction and compounding, the 195/50R15 makes much more grip than the 205 or the 225. Similarly, there is only one rear tire that's any good. I can't remember which one it is at this time but it's not the 255. It's a smaller size.
Also to note, as the R1R wears down to around 3/32" performance will DRAMATICALLY reduce.
And really, the best street tire out there these days is the Bridgestone Re-71R. There is no street tire competition. I'd wager that on a light car, it'd be better than an R888 but I've never seen and testing to prove this.