HeliHenri
have a look at who the new aircraft sales go to. the large majority will go to large organisations and governments. Most of them aren't playing with their own money, or have a built in equipment replacement program every so many years, and wont get hit with the bills and maintenance issues that the guys running the 10-20-30-50 yr old machines have to deal with.
I'm sure the 350 is a nice machine, but its the engine and component costs and availability once you have a 20 year old, 10,000hr machine where so far Euro/Bus have fallen over.
I don't think that its particularly that Bell have done anything better, but when you can buy another entire Long Ranger for the cost of a couple of modules it surely has to make you think about it...