Coilovers will certainly give you the greatest flexibility of your ride height, but the good ones aren't cheap. If your planning on spending $2000.00+ on a set then you've got a couple of good sets to choose from. On the other hand, if you plan on spending only in the $500.00 range, do yourself a favor and avoid the cheap coilovers.
I've got 225/40/18 Nittos in front with Eibach springs. I rarely rub, only at parking speeds with the wheel locked.
I'd say you should be safe.
Make sure to get an alignment!!!