I posted my experience (or the few bits of it) with the falken st115. Also, price wise, this is the price that I got when I changed my yokohama ad07 15" to my falken st115 14".
Some purist says, R33 is the best in term of power and ride & handling outshine its other sibling. I read in few mags confirming the R33 as the best Skyline with RB engine ever. R32 was perhaps the one that changed...