I think 4 18's ported is almost too much for daily. You need a bunch of highs and mids just to keep up with the bass. It should be killing your ears with it half way turned up. It will probably annoy everyone even when you turn it down because bass from 18s travels really far. I've heard one SoloX 18 from far away (maybe 400 yards), and it was underpowered but loud and deep. In the right box you probably won't be able to see out your back window. My ears aren't weak at all and I consider myself a Basshead. Two 15 Hdc3s was killing my ears on music in a Tahoe. I'm just giving you a few examples incase you don't know what you're getting into. It will be expensive and extremely loud. If you set it up right, almost everyone should be tapping out. Depending on where you live its hard to not get a loud noise ticket with all that bass. I'd go with the Fi Bl if money isn't an issue.