Just wanted to add my recent experience after following all the info on this thread.
I've driven the OE Hankook Ventus S1 Evo3 summer tires on 17" wheels over 2+ years, mostly on Green mode, although my car insurance says there's too much "lateral acceleration." After 25K mi, a screw punctured the sidewall and since the tread had about 1/3 life left (4-5mm) and needed an alignment, I got a new set from Costco. With the December sales, I got the Bridgestone Driveguard Plus runflat all-season tires installed for about $850 (including Costco warranties).
I really wanted all-season tires since there are only a few dozen winter weather days in the DC area, and even fewer of those days where I want/need to drive. Basically we were just garaging our SE during the winter for the first two years. Runflat was a nice bonus, so the wife doesn't need to deal with a tow, though I would've been ok with the Michelin Pilot 4 All Season if they were on sale.
After first installing the tires, I noticed it being a bit less precise and a little harsher than the Hankooks. But since the SE handles so well and the ride is already so bumpy, I don't really notice the difference after 1K miles. My wife hasn't noticed anything different either. I think mileage has dropped about 10% on my regular commute during comparable weather, but I get to drive it an the additional 3 cold months out of the year without having to switch & store winter tires, so I'm super happy about them!