Were you happy with the Sumitomos? Would you buy them again? How long did they last? If you liked them, there's certainly nothing wrong with buying them again, as they are the cheapest name-brand max performance summer tire, made in Japan.
For summer tires in the size 245/45-18
Max performance Summer
--Michelin Pilot Super Sport (if you can afford them!)
Winter tires in the size 215/55-17
Standard studless winter tires
Am i happy with my sumitomos, eh.. they got the job done in the 30-40k miles. My first set was Pilot Super sports and i loved them but hated the price and it only lasted me 15-20k. I didn't notice the lost of traction going to a less sticky tire.
I've own Blizzacks before and now i'm on Yoko iceguard IG52c.I like the yoko more.
Seems to me that you need 3 sets of tires.
1 for everydayness/highway use
1 for your autocross/track days
1 for winter
If my budget can do this, i would have easily done it. I just don't do it as much as i used to. One of thought was going with a DWS06 tire and have a middle of road tire and save some $$ for possibly a miata.
I live in the city and work in the burbs. I have to take local highways to work. So for the most part its plowed. Plus side i have AWD, down side its lowered about 2 inch overall (think bmw/audi sport package). But i have the option of working from home when the weather is super bad. So i'm thinking of trying just getting a set of 17's