+1 on the Sumitoma HTR Zlll's. They are not quite PS2's, but at less than half the price, I can replace the rears twice and still be spending less than just 4 PS2s.
They are more quiet than the Michies, but not quite the traction, especially when you first nail the brakes, they seem a bit "squishy", but as soon as they settle down, they do fine.
I'm also going from low tread depth tires to full tread depth newbies, so a brand new set of PS2's may feel very similar. I destroyed my PS2's at a track event, so they weren't old and hard before being replaced.
Overall grip and balance seem about the same without a stopwatch.
