Dropping and Adding Rims

I have a 2001 Accord Coupe and wanted to add bigger rims with a drop. I had initially planned on 215/40/18's and a 1.2 inch drop from eibach (the pro kit).

I was wondering, wouldn't changing the tires make the car ride higher? Should I change the tires first, and then see how much I need to drop it?

I wanna fill up the space in the wheel-well, but at the same time, winter's are harsh and this is a year-round car.

I'd appreciate the help...thanks.