I'm new

Hey guys,
So I'm new to all this and here are the specs:
2010 Acura TL FWD
Ext/Int: Diamond Pearl/Ebony
245/50/17 all around

I just want to get wider rims.. Maybe 19" or 20" but don't know what's best because I drive it daily.

I live in an area where there are hills and speed bumps. Winter time there's a lot of snow. So lowering the car may not be the best..
What do you guys think?
Thanks!!