So I'm about to explore the multiple server scenario. Read through a dozen or so related posts first and the Wiki.
I'm generally not using headers lately, just Watch Topics. Starting to see allot of (well, more than usual) 430's from Giganews. By adding UsenetServer at the same priority (since it's unlimited too) Newsbin will just automatically look there the instant it gets a 430 from Giga?
I saw another forum post about determining which server delivered a post. I suppose maybe that could be discerned to some degree looking at the log? Otherwise I suppose the amount downloaded on the Servers tab could give an indication of how much the 2nd server might be 'paying off'.