BTW - converter and shims are not the same thing. The converter for the old Sizzex was to allow you to cut the thin dies. A shim is just pieces of paper that you add to slightly increase the thickness if you are not getting a clean cut.
I have the BS and still love it (the turquoise one). I won't upgrade for color since it works just fine especially since I'm not much into pink (Whew, dodged that bullet!).
I've been buing other dies and they all work just great in the BS. I think it's one of the better purchases I made and I like that I can get dies with coupons at Mike's and the Sizzex web site has some pretty good sales.