In reply to Goucho:
PHD for the down bags & jacket.
As for the rest of the clothing, its down to if it fits you, I personally use Patagonia because it fits my body shape.
The only other criteria I personally have is, it must have Velcro cuffs & most defo a hood!
As for hardware, its a mine field, sure there must be better informed people on here who could advise you.