I was just out on ours this afternoon. We have a big, like 11' Hypr board. Got a big one so I could put our daughter on it, or the dog, or daughter + fishing stuff.... Have tried a racing board and you can feel how much faster it is, but I'd not be able to load it up.
A local to us multi-sport store carries Hypr and they do a ton of demo events and bring out many of the different boards for people to try out. I'd suggest trying out some before buying. The different styles ride and cruise all different. SUP'ing is a good core workout and kinda quite on the lake fun.
Here's a pic of our daughter on it, kinda gives you a feel for how big a "family board" is.
I've thinking of watching Craigslist this fall and winter for used boards. See if I can pick up a smaller one for the wife. Right now we take turns or she open water swims and I SUP with the little one on board near her.