I have a Peugeot Expert Van which isn't on your list, but is slightly bigger than the Berlingo, seats 3 in the front if you want that, and has a very good HDi turbo diesel engine. It tows the boat extremely well (far better than the fiat van I used to have). I didn't get A/C installed, but I did have ABS installed which has benefitted me quite a few times now
There is a new model out very shortly I believe which is slightly bigger for the same money - this could mean that you may get better deals on the existing range. Although it probably doesn't affect you, in the UK, we'd argue that the Expert is "car derived" from the Peugeot 806 before it was revamped a few years ago, which supposedly gets it out of a few speed issues.
-Alex