ok meng...let me interject...
EZ...it's true, your first post is contradictory, because there is no sport touring tire that comes with grip because they are designed to provide mileage over grip.
so what you wanted to, meant to, and implied in your post is "sport tour tire that has the most grip when compared to other sport tour tires".
abad is some sort of an engineer...and reading between the lines can be hard for engineers.
with that said...the answer you're looking for is most likely the diablo stradas...but be careful, because you aren't going to get nearly as much grip as with the sport tires and so forth.
also remember, they may take longer to warm up...i know the stradas does take some time to warm up.
lastly...don't force everything up on the tire, meaning if you take turns smoothly and in rhythm, your tire will grip just fine!

Mawfaki # 0.5
"Let the ignorance die with the ignorant" - Tahoe SC