I just bought #2:
2. 275/35/18 Star Specs all around
However, my reason for doing this is that I'm also planning on using them for street, until I get a new set of street wheels. Therefore, I needed decent rain handling.
My next set of track tires (dedicated) will be the Hankook R-S3's in 275/35R18.
Did you consider the Nitto NT-05's? I think it should do better than the Star Specs (except in the rain).
I've seen a few posts praising the Falken RT-615K's. Might also be worth a look.