Thanks for the swift and informative replies.
I'll confess that resale isn't something I considered previously, and is a compelling argument for the WBBB. I have also had opportunity to lay in one, and found it to be very comfortable. I have not had the same opportunity with a SBP.
I've also seen some reviews of the SBP citing poor build quality, loose stitches, fraying ends, etc..
I guess to be truthful I was hoping for someone to post a compelling reason to get the WBBB over the SBP, and help me justify the additional cost to myself. As mentioned before, while cost is a factor, if it is justifiable, I'll find a way to make it work. (Also helps me with the ensuing argument with the wife, aka "the boss")
I'll keep doing some research, and hopefully find someplace local where I can see and try out a SBP, but I'm going to keep my eye out for a good deal on the WBBB!