Here's my Voodoo Wanga :
(if you can't see it it's a facebook thing).
with 100mm Reba's on, XC717s on Hope XCs, and 110mm stem, which I use as my 'guest' bike as it is so solid. Weigh's about 26 like this I think.
It has sliding paragon dropouts so is pretty versatile and I keep considering putting an Alfine 8 on the back, but in reality I don't do mud so much these days and if it is not too bad I take the turner as the bushings are so good in the mud.
You are welcome to come and try it as is, and I could put some lighter wheels on if you want to see what it is like with a little less weight.
I could then swap the frame over to the Bizango as I was going to do this anyway to see what it was like - I had always been on the lookout for one from ages ago and then one came up on ebay, so I bought it when I don't really need it now.
So one frame will go and the other may become the 'shopping' bike for runs to the local village...
Note than the Wanga has a very tall headtube so is a bit different to the bizango - but the user reviews are always very good so it is worth trying I reckon, if you are close.
Also note that seatpost/saddle combo - USE titanium and an old flite gel flow - it's really springy and add a lot to the ride quality !
I will email you...