Join Date: Nov 1999
Location: Where the Navy sends me...
I think the RA-1s would probably be the best track tires if you're not worrying about being the fastest guy on the track. They have a well-earned reputation for lasting a long time, and maintaining their performance throughout their life. (I've actually never used them myself, but have run events with guys who do, and have read plenty of positive comments about them over the years on various forums.) I think the NT01s are the fastest of the 3, if that matters.
I can't speak to the auto-x options, as I haven't run any of them. I expect for auto-x use the Michelin would be out-classed by the others, which are all dedicated "cheater" 200TW tires pretty much specifically designed for auto-x.
'89 GT convertible, N/A 357W, MM front susp w/425# coil-overs and Koni D/As, MM TA/PB rear setup (Koni Yellows, 390-430# springs), Stoptech 332mm / 12" Baers, MM 6 point rollbar, Maier 1.5" flared fenders & quarters, 18x9.5" front/18x10.5" rear Enkei RPF-1s (street), 18x10" CCW C-10s (track), etc...