i put some 18 inch rims but i hate my low profile tires (225/40/18 front 225/45/18 back)

looking to buy some new tires, i want something with a good sidewall height, something soft, and a good performer, for acceleration.

thinking of 255/45/18 all around

i found found 4 new Nitto tires on eBay for $500 with ship

are nittos any good?
what other tires can i buy for under $600?