The T1R's will be pricier, but what an awesome tire. The Kumho Ecsta MX is a STICKY tire. It has a slightly soft side-wall, but it's still quite grippy, plus you can get it in any size.
If you want all out, the RA-1's are untouchable. Then T1R's, then RT615's. The Bridgestone's are usually pricey...
Good stuff in this thread though.
SS