My 2005 Ext has P265/70R17 tires that I am going to have to replace soon. My question is: I know the "P" stands for "passenger tire". I have also seen tires that begin with "LT" that stands for light truck. Since the Ext doesn't fall into either realistically, I guess the "P" is what I should get since the owners manual states such. BUT- my question is what type or style (tread) should I buy? There are so many choices on treads, etc it gets confusing. I want to maintain a comfortable ride, yet have enough good traction in winter (we get some brutal winters in NW Pennsylvania). Anyway, advice would be appreciated. The price scale is very wide on styles. I just want to get 4 really good tires that can be all things in all weather. I do not go off-road or anything like that (never felt the Caddy was really meant for that.) The forum is always so right on with advice. Thanks everyone- I welcome your opinions and advice.