Some wise members on here (they are, they just don't seem it at times
) advised me to not even consider the price when I was making the same decision. In my case the Beach, when specced up to Ocean level in terms of driving stuff, 3-window bellows etc was almost the same price (Ocean starts cheaper in Spain as there's no Coast) and it's tempting to think, ooh, I get the kitchen etc for free. Which is great until you wish you'd gone for the extra width of the 3 seat bed.
I agonised over it too and went for the Ocean on no more than a hunch it suited *us* better. Based on my own use of the current van, a Beach would suit *me* better. However the family loved the Ocean so my hands were tied in the end.
I don't think you'll regret it at all. It's not exactly expensive to hire a 7 seater or panel van should your kids require moving to Uni or something.