I really enjoy Avions. The presentation is wonderful, the image reproduction top rate. Unfortunately the latest profile artist they have is, uhm, how to put it - takes a lot of artistic freedom with the general outlines of the aircraft.
My biggest complaint is the lack of English. But that's probably just me.
The hardback on Guynemer is fantastic. I sure hope more is on the way (although I did miss pre-ordering for the Dorme book :-( ).