One thing to remember is that the suspension design for our cars was on 13” rims with skinny 165 tires.
So by moving up to 14” or 15” adds more sprung weight with some disadvantages: wheel bearings wear faster, heavier steering/feedback and less compliant ride due to loss of sidewall. 195 or larger tires only add more weight.
That said, I’ve gone to 14” but have moved down to 185s. I’ve thought about 15x6 but given the poor roads in the Seattle area combined with urethane bushings, shorter springs and Bilsteins HDs, I’ll stick with more sidewall.
Just my opinion and YMMV.