What kind of look are you going for? Do you want the wheels to fill up the wheel arches and be near flush the fender, or do you just want a tad nicer OEM looking wheel that sits the same as the stock wheels? I'm not really following what you are trying to do here. It will be just a little work to make 20"s flush and a lot of people on this website would agree that it is not really wise to go all out on 20's.

 

I like those that make the OEM looking but also nearly flush the fender, they don't look so "street". Like this LS with Lowenhart LS5, this one doesn't seem to go staggered:



Now I'm still stuck whether to go staggered or not, I read several posts about it but they only mention the better acceleration and braking, I don't think I will need those too much, I need to know which one has more comfort.

 

Those 20" LS5 look great on that LS..nice OEMish looking upgrade

 

Go with a 30-32mm, offset..that should look pretty good and flush with fender without rub on a non lowered LS