B4...jury is still out. Guides and skiiers love it.
Windows (lots of them) fog up when it gets really cold. Hot sweaty skiiers get in and open up there jackets! It uses an standard squirrel mixing box and unproven hosing to get the hot (by then not so hot) to defog. Eurocopter is still working on it.
The C of G vs. Fuel ratio doesn't allow you to run the 3 pax up front with any kind of altiude (safety margins) as you have to carry more fuel and not allowed to burn it off to empty, so you are back to 2 pax in the front jsut like a B2 (but on steroids), The $$ ## dont work with a 3 million dollar 6 pax machine.
Better bet is the B3 with a love seat. The new dual hydraulic B3 has an increased internal gross. Which legally beats the 407 (they are good). Remember that Canada has a standard wieght for pax in Canada (206 lbs.) in winter. Do the math. I dont know too many Bavarians that are less than 200 lbs!!
Basically every machine has its problems (I think) B3/407 good...but really expensive. B2 ok $$ but a little underpowered (with 6 pax). Mediums? again expensive and the customer needs big volume of clients.
Take the insurance off for the season and go surfing!