I'd buy:
Craftsman impact sockets & extensions
IR 231HA 1/2" impact, whatever IR is comparable for 3/8" impact
12V lithium ion 1/4" impact driver. Maybe a 18 or 20v unit, actually. Probably go Makita.
Ebay Snap-On wrenches. If I was going new, I'd go Craftsman Professional. I've got snap-on in my tool box now but I should have stopped with the Craftsman Pro - Danaher, the company that owns Matco, whored out Matco wrenches pretty hard and made a very comparable product at 1/4 the price.
Knipex and Klein pliers. If on a budget, Irwin. Don't cheap out on big channel lock pliers. A ****** pair will skip the joint and slam shut on your fingers, slip on the fastener hurt you, etc. Get the big-damn Knipex channel locks and never look back.
Screwdrivers... I've got Craftsman and I've got Snap-On. For quality, I don't like the Craftsman. For price, I hate the snap-on. I'd look for middle ground elsewhere. Probably try Craftsman Pro if I'm in the market again.
what else.
Plumb & Vaughn hammers. Punches & chisels, whoever.
Torx, External Torx, "funky" fasteners - I hesitate to recommend Snap on very often on account of the price but I'd go no cheaper than Sunex on these. You don't want to strip or break anything internal wrenching because next you have to get the drill out.
Basically, if you can't Ebay a Big Three (or Four if you like Cornwell) I'd go Knipex, Craftsman, Klein or Sunex.