I have the 45 as well and I rank it right up there with the 46. The one criticism of the 45 that I've heard is that the helmet size is a tad small, but I think it was that way on screen.
I also never cared for the 47 - IMO it's just an unappealing repaint of the 46. I'd go for the Concept Art 46 before the 47. The 50 has the leg gap complaint, but otherwise it's a beauty. Still, I'm passing on it & opting for the 85.
For those that you asked about, my order would be 46, 45, 50 and 46 Concept Art, with 47 bringing up the rear.