I'm a fan of Corsair 80+ for PSU, tbh... plus with these CPUs/vid cards/SSDs being finally power efficient, you can get away with a 450W-500W PSU easily, and Corsair has some modular ones for as cheap as $50, including 3 year warranty.
I was thinking 8GB too, even considered just 4GB, but again, don't wanna cheap out too much. You don't want to spend $300 on a video cards then be swapping out. However, I would rather buy a 32GB capable mobo. H81 are the cheapest, but they have 2 cons, IMO: only 2 USB3 ports and 16GB max... B85 or H97 are probably the way to go, I don't really care for overclocking, so a Z97 or a K proc doesn't make sense for me. Which is good, I can cut some corners there.
I'm putting together a backup box monday with a Haswell i3. I'll play with it a bit and see how it performs. I already have a couple i5s at the office and they're such kickass processors. Super silent and power efficient at idle, and the 4 cores really give you a bang for the buck when you gotta crunch numbers. Ideally, I would love to get an i7, but they all start at $300, sandy, ivy, haswell... just more than I'm willing to spend right now.
Thanks for the heads up about the upcoming cards. Had no idea. I'll probably wait a couple more months.