All of you : thanks for your answers/comments and great links.

I had not realised, before ordering my Condor, how it would ride so high on my back.
For my current EDC usage (not really heavy loads, no long hours of walk), it's OK and the pack is really tough... which is important for every day usage...
No regret.

As explained in this thread, I was looking for another backpack, between 40 and 50 liters.
Some links I received today make me drool over interesting packs (that custom shop in Seattle : aaahhhh ...... <img src="/images/graemlins/laugh.gif" alt="" /> )

But today, I bought one : I had spend sometime selecting a few packs from online catalogues. And I went to a shop to actually handle the products. And to get some explanations.
But I could not find THE back, with all the features I wanted : the waist belt from this one, the frame from that one, the shape and size from another one, etc.... Sadly (IMHO...), some features exist only on big packs (well above my use), ie adjustable back (you choose the "heighth" at which the pack connects to the shoulder strap system ....).
Plus, "civilian" packs lack all the modularity found on military packs (i.e. PALs webbing allowing to add/remove additional pouches etc...)

I finally choose a Millet (against a Lafuma and a Deuter) backpack : model "Odyssee 45" , which is somewhat of a compromise.
It should be OK with moderate loads (well... I will see...)
Anyway, if I want more volume, I don't want a heavier load ; on the contray, if I can.. (reading all those web pages about light backpacking ... some good ideas, without having to go to the extreme lightness...)


Thanks again.