If you are taking the family, consider if you wife/kids will be ok with wet feet for 4-8 hours.
No matter what kind of water you're in, you'll probably have wet feet for most of the time you're on the river in a raft, whether its a bucket boat or self-bailer. If you're in Class II whitewater, you can probably run a bucket boat (non-self-bailer) and not have any trouble other than the occasional splash or two into the boat, which are then easily (mostly, but not completely) bailed out. If you're running Class III whitewater, you'll be getting a few bucketfulls of water into the boat on a regular basis. If its your first boat, there's no need to throw down a hefty chunk of your disposable income on a SB if you're just going to be fishing Class II water and taking the family on float trips.
The cost difference between a SB and a bucket boat will probably be about $750 - $1000 which will easily cover the cost of neoprene booties & socks for the family.
Here's a good deal for an Avon (which holds value better than any other brand) raft in the swap that you could buy, use and later sell the rubber for $500 easily and keep the frame and gear to use if/when you decide to upgrade to a SB:
That's basically $1200+ worth of used gear and the raft tossed in for $300. I don't think the babe in black comes with it though...
Or there's this SB starter package - though at this price it should be inspected very carefully before buying:
Good luck finding the right boat!