M3roar wrote No, no bug bit me.... Ive been whining about grip for a long time. And since PS2s are great daily tires... why change them. Best bet is to have a set of track dedicated wheel and tire.
Anyone running 18x10f and 18x10.5r? maybe a 275/35/18f and 295/35/18r?

The bug seems to have bitten disapr...
I've done a lot of research on wheel/tire combo's...months of thinking about my setup. What I've found is if you do go with R-Comps eventually, I don't think you'll find many 295/35R18 options.
The issue you may run into with the 10.5" and 295 rear is if you run R-Comps or some extreme performance summer tires...might rub.
I would like to get some more rear end grip with a wider rear tire but you run into limitations if you step up to R-Comps.
I like the ability to rotate my tires on my E46, you get a lot more life out of them. On the E9X, I've seen most tracked cars with a lot of wear on the outer edges of the front tires. So I think a square setup will drastically cut down on tire costs.
If you plan to run street tires for a long time...then I think 275/295 is what Paintpro recommends. I think those are the tire widths that Dinan runs on their 19" setup.
I've ended up deciding to use my ARC8s on the street and 4 rear OEM 18" wheels for the track. Both setups with 275/35R18s. Whenever Apex comes out with a new wheel and if I like it, I will swap out the OEM 18s.