Federal RSR's
 

Has anyone here ever had an experience with these tires? I hear lots of good things about them at meets, and I happen to be able to get them pretty cheap so I'm considering using them as track tires on my 18's(they don't sell 19's sorry guys)

I liked them, good wear and good grip. Took a little bit to get up to temp but not a huge deal.

How do they compare to other common tires used like the Michilen pss or the re11's or Continental DW(etc)?

Honestly I have not used any of those.

They last longer than the NT01s, about the same grip but better in the rain lol
RS3 lasted WAY longer but id say slightly less grip as they got real hot.
RT615k wore out faster, but had way more grip.

A lot of my 240sx buddies swear by them. Bang for buck they say you can't beat em. It's sort of like the RS3 for our car. It's considered kind of a budget tire, but for what it is at the price tough to beat. The Michelin pss are for Bimmer *** heads that like to hard park, not even in the same category of tire.