Sport Package, wheels in snow question... please help

[steve]

Hi

am about to order my e70. Want to get the sport package, but living in Wisconsin, I have a couple questions.

1) Will the all seasons in the base sport package be good in snow (I see they are listed as all season, but wanted some real world confirmation since they are still 19's).

2) If I opt for the optional 20's, will the e53 tire/wheel packages fit or will I have to find someone with 18's from the e70? And what is the treadwear on the 20's? and what brand are they?

Thanks much in advance!