Hey Matt, you got some great bargains there! $10 each? That's less than £6 in the U.K.!! I've heard good things about the Herc, and the FW190 is supposed to be good also. Sorry, can't give any tips for the '190, these days, 1/72nd is a tad too small for me to handle!
Jan, I think all you need now is a hangar and a work force, as it seems you've got enough kit and tools for an aircraft factory!
As for primer for the etch etc, Wayne will be the one for that, as I have limited experience of etch. But, when I have used it, a quick rub over with fine wet and dry, then a coat of enamel, normally matt light grey, has done the trick.
Looking forward to seeing the various builds guys.