New Computer, help me pick out a motherboard?

[DonLorenzo]

Hi Guys,

I'm currently reading up on what current hardware looks like (I haven't really kept up for the past few years) and so far I've come up with the following. Please do tell if I'm missing great synergies, bargain price/performance ratios or superior options at a relatively modest amount of $ extra. You know, consumer stuff.

So far I've come up with

GPU: R9 290- Reasoning: Good high end card, but I think the upgrade to the X isn't worth the extra cost.

Memory: DDR3 1600Mhz 8GB. Or 16. Undecided on whether to get it 4x2, 2x4, 2x8 or 1x8. It's all approx the same price/GB, anything to note about that?

CPU: i5 4670- Reasoning: Best price/performance. I'm going to do mostly gaming and scrypt mining (for which the cpu doesn't really matter). I want to be current and not be bottlenecked, but don't need breakneck CPU performance.

Storage: Looking at a 240GB SSD from one of the more reputable brands which I'll supplement with my junk 5400RPM TB drive for unimportant/slow storage. Might add a new regular HDD for data that's important yet doesn't need to be fast.

PSU: A high-end KW+ unit from a good brand.- Reasoning: If the scrypt mining works out and stays profitable I'm going to add a second R290 and I want the psu to be able to handle it.

Motherboard: Not a clue. They range from 50-300 bucks and for the life of me I can't spot the difference. Apart from the obvious stuff like how many slots of which kind they have I don't know what to look for here. The 300 buck one had an NFC on-switch which is neat but not worth hundreds of extra bucks

So that's what I'm looking at. As I said, please enlighten me on any things I might be overlooking!

For comparison's sake (and to see why I'm quite looking forward to getting new toys!) here's my current specs

-AMD HD5770

-AMD Phenom x4 955

-4GB DDR3

-Two 10 year old HDDs

-a PSU that rattles like an old soviet truck most of the time

Cheers!