I have had all versions of B1 and B2, I have B5s as well as new version Swarovski SLC 10x. The Swarovski were at a ridiculously low price to the point I could sell them anytime and make a good profit. We have kept the B1s and I just ordered another pair from on here for a family member. So, I think that makes 6 B1 pairs by family. I think the 11x B2 has the most noticeable shallow depth of field, I never noticed such a thing with any others including my B5s. The B2 9x are nice, just not my style, and I think the B1 is outstanding. My wife and I work on an even score board spotting animals from tripods, and she sets up with the 8x B1s, she can out glass most folks we have been in the field with.
I am on the look out for 6x or 8x B3s for a give away price.
Would you say the b1 can resolve in low light similar to the b2? I'm trying to get hands on to compare them and currently have an slc and toric that I'd like to compare with.