IMO the 20's are still a "summer tire". below 50F you may encounter traction issues. the 20" wheels are all bling and such, and i wish i had them some days, but truth be told the 19" all seasons have served me well over the last 6 months and 12k miles.

if this is your daily driver bro, my guess is you will be replacing the tires within 8 months strictly due to the need for an everyday tire. we got 2.5 inches of rain today in less than 2 hours. i certainly would not want to be driving on summer tires in that sort of mess.