Accords with 18s are nothing rare at all....6th gen Accords are about as popular as any other so this will be nothing new.

The main thing to remember is to put on upgraded struts when you do the lowering and to also do the camber kit at the same time (unles you like buying lots of tires).

Stock struts have too long of an arm to be effective for any long period of time and will result in a bouncy ride.

Another thing that you may run into is clearance of the tire to the fenderwell. If you get any rub you can simply roll the lip with a wood baseball bat (usually it is the lip that rubs most) and this will limit chopping up your tires.