I did a road rally in Chihuahua Mexico with Michelin Defender 185 70r14 on my 78 alfetta sedan to get better road clearance (speeds bumps from hell) and reliability. Even though they had the road UTQG of 800 A, they stuck like glue on the speed sections, often over 90-100mph on the long sweepers and barely any tire squeal on the tighter turns. The car doesn't weigh much as opposed to a new performance car so it was light on the tires.
Now the gtv6 weighs about the same as the 78 alfetta sedan, relatively speaking.
A response above mentions out driving your tires. I would take this into consideration and your spirited driving style. I've had the cheaper Generals on my GTV6 driving through the Sierra Mountain passes, and my brakes fade before my tires give out. And that was Glenn's Blue Meanie GTV6, before I sold it to him.
so.....in doing a quick tire rack search for 190 60r15, there are a ton of options. I just wouldn't get so caught up in the whole "designated performance" bench racing. There are at least a dozen worth while tires offered in all sorts of prices.
'76 Alfetta GT, 2013 Fiat 500 Abarth, '78 sports sedan (2 of them) - sold, '91 164L - sold, '83 GTV6 -sold, '87 Milano Verde - sold, '91 spider -sold, '69 MGB GT,