You're buying a boat and would like some recommendations?
I highly recommend you take your boatless and currently shore-based diving buddies out on spearfishing trips in the new boat as often as possible.......
But seriously though, I'd have to strongly agree with Tyson's tip on getting a half-cab rather than a centre-console; if you're planning on taking the missus and young fella out in it, having a comfy half-cab to stick them in out of the wind and the spray should the conditions get a bit ugly will make an absolutely mammoth difference to them.
They might be able to hack a cold breeze in a boat, but in a centre-console they'd be copping spray from the bow no matter where they were in it, and when that happens they'll get really cold, really quickly.
If they're getting cold, wet and miserable on every trip, pretty soon they won't want to come out at all, and who knows, if the budget gets a bit tight, you may just find yourself under a bit of pressure to sell the boat.
So if you can find a safe, reliable and seaworthy boat that'll keep em warm & comfy in all conditions, um, probably the other thing that might throw a major spanner in the works is whether they get seasick or not....... guess you'll just have to keep your fingers crossed on that one (and maybe stock up on some "Sealegs"!).