I'm looking at changing wheels and tires on my 2010 GE8 Sport (Non-Navi, Non-VSA, 5AT)

I'm thinking about running a 15x7 TRMotorsport C1 rim, with a 195/60/15 Kumho Ecsta ASX tire.

According to TireRack, the offset will be about +42mm, and I'm just curious what offset to use to really bring out the handling. Hopefully, nothing too extreme. Just wondering if anyone else on here uses a 15x7 and would share their offset so I can have some idea of what to do. I was thinking of just offsetting it by an extra 10mm, but just thought I'd get some opinions.

I'm hoping to use a smaller wheel with a bigger tire to better the comfort, and widen the tire for better stability, and at the same time shave a little bit of weight off per wheel. The bulk of my driving is on backroads and twisty old highways, so any guidance is appreciated.