Nice ride B-Rune, saw them in the ads and checked them out, really wish I could justify another, but just honestly can't and since a 650Bx2.8" will fit in the rear of all my bikes, so I honestly am good to go. Here's 2 pics on my inaugural rides with both bikes I've tried 650B+ on, just get a quick feel for them and take a pic or two.
Paradox with WTB Asym i35/Pro2 wheels and WTB 2.8" Trailblazer r/ 3.0" Trailboss front. This was my first go at B+ and those were the cheapest tyres I could find. Actually got the 2,8" first to test fit in my frames, then ordered the 3.0" thinking it would be undersized like the 2.8", but it was not.
Phantom with WTB Asym i35/Pro2 wheels, 2.8" Nobby Nics. Got the Nics to try and gain some wet condition traction as the WTB were just stupid scary in the wet, not grip what so ever and the Maxxis weren't yet available.