I clocked the other thread, but it was a bit too specific.
White Dwarf (subscription)
Signs and Portents (free online MGP)
Strengths of WD - mainly catalog (self promotion) not too many others...
Signs and Portents - free! Free rules, ideas, a small catalog section.
Wargames Illustrated - articles of all periods, free rules.
I personally find Signs and Portents superior to GW for an 'inhouse' magasine, and Wargames Illustrated for general articles.
What do you think?