aimcat... there's only so much anyone on an online forum can do for you... as has been mentioned you need to get out and look at the boats in question and get a feel for how they look, how clean they are, is everything there that is claimed to be...
Making decisions from a distance is not a good plan.. people do occasionally buy sight unseen but it rarely works out well. Another issue is with today's online availablity of pictures and information, it's nice to have but in no way guaranteed to be current or accurate. The personal look is really an imperative.
So you need to go see the Helsen, compare to the others, factor in the issues either boat will have and try to make an objective decision.. in the end you'll likely go with a) the one that 'speaks' to you, or b) the cheapest one.... option a) will probably be the better one.....
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)