Swift springs are the first thing that come to mind. Just keep in mind that "comfortable" is relative to other lowering springs. If he would be annoyed by more bumping or a stiffer ride I would go w/ an exhaust or CAI. If he wouldn't Swifts are awesome!

 

Plus one for the Clazzio but make sure you order one they have in stock if you need it right away. I ordered mine last week from BeanGarage but I have to wait 8-10 weeks for the black/black/red-stitching to come in from Japan.