I like to replace Zinsco panels with either Federal Pacific or Wadsworth, that way there's no real adjustment peroid for the homeowner to get used to the idea of the panel not smoking and the lights staying on. While Suare-D is the Cadilac of the residential electrical panels, they have had some recalls of their arc fault breakers. I've always driven a Ford and put some hard miles on them. Suare-D seems to be the agreed upon choice but I have not any real problems with a quality install of either GE or Siemens. Think about it like this, a chain is only as strong as it's weakest link and most houses are full low quality electrical crap. 14/2 Romex , back stabed into residentail receptacles that cost 35 cents each. The people that do the install are just as important as the name on the panel.