[SLtoRL]

This may be a stupid question, but I don't know the answer and can't find it here in the forum...

I want to lower my car with either the Eibach sportline springs or the springs from Kappasphere. I currently have 20" rims (245.35.20).

My question is this:
If I lower the car now with my 20" rims and decide later on to go back to 18" rims will the car still look as though the top of the wheel and the wheel well meet? OR, will I somehow screw something up and have to go through the lowering process again?

Which springs would be better to go with and why for my situation?

Thank you guys.

-Nick