To tell you the truth, I'm leaning towards Hasselblad. The reason is probably as much emotional as it is rational.
First, I really like it - it really has a unique aesthetics. Second, there should be no problem finding parts for quite some time in the future. And third, the price is not much higher compared to other systems. I mean, you can get a Hasselblad - A Hasselblad for less than Canon 10-22 digital only lens that's not even L quality!?