Thanks Julien.
Presumably that means the dp1M isn't too far behind. Which is what I'd go for I think.
I'd have to sell the summicron though to afford it ... Bit unlikely :-/
I'm in, the question is when. If I succumb to temptation and mysteriously find myself exchanging cash for an OM-D, the Sigma cameras will be somewhat further in the future. If hesitation and pennypinching hold out, I might have the Sigmas instead. The amount of cash I want to spend to create an acceptable OM-D kit is more than two DPxM cameras.