I am very sorry for the people who have lost their money. And if the sad stories from Doug are true, i feel sorry for him. But that does not make it in anyway OK. The money is not his to take and he should have either not accept it or immediately return it when he realized he could not keep his end of the bargain. However after all these years i do not think it's very realistic to think that the he will ever refund any money. The money is probably long gone for what ever reason. It's hard pill to swallow but this is the harsh reality.
The Rigol DS1054Z looks nice and the price level is the same as the DS1052E a couple of years ago. I would go for that one if i were you. If money is an issue, the Owon SDS5032E is like a 100 euro cheaper.
Personally i wouldn't buy a scope which requires a PC. You are totally dependant on the whim of the manufacturer. If they decide to stop supporting the scope you are stuck with a very expensive brick.