I've been using the tiny Gitzo Traveller G1550T for about a month.
It's superb, more than sturdy enough for my M6 and heaviest lenses, and the new new anti-rotation legs make it a snap to put up. Best tripod I've ever had.
It's only 1kg and as it fits into by camera bag, a small Timbuk2, I take it every where ( a tripod in the bag is worth two in the house :-)
I also have a G1228 which I would use with the Hasselblad, but is overkill with the M6.
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