I have heard a single 418 last week in bar setting and it sounded great. I have mixed live sound with my buddies old sw118's (probably 1st run) and it sounded great.
I know the sw118's can go pretty low but I've read numerous posts praising them or saying they have no volume or fart out when pushed. I'll be doing indoor and outdoor stuff for 100-200 people. I need to stay in $500-600 range.
Jbl is 4ohm and cabs are better from what I hear. My guy tells me jbl for the long term but I did like the sound of the yamaha and the V has more power handling than previous models.