I've got a Bombard DB600 and I'm happy with it.
Trouble is I'm not qualified to advise really as it's my first RIB and I've only had it a few weeks!
As far as I can see it's not a deep V hull, more of a medium V which is fine by me as I'm after economy rather than rough water capability.
But I've been to France 3 times, across the top of the notorious "Race" with no problems.
I blend in well with the French RIBs as there are loads of Bombards there.
Looks like a good price to me, and it's local to you too.
It cost me £460 to ship mine to Alderney from Poole
Hope someone with more experience can chip in.