Looks pretty good, but there are many parts where you could save a some cash.
Water cooling is completely unnecessary, and not an optimal solution for stock clocked CPU anyway because there are quieter and cheaper air coolers.
hand my 2 year old PC down to her (She only uses it to do the bills and some very light gaming).
Would it not make more sense to keep your current 512GB SSD for yourself and buy a 250GB drive for your wife? It doesn't sound like she needs a 500GB SSD for light gaming. If she needs more than 250GB of storage, 120GB SSD + 1TB HDD should be more than enough.
Then if you need more storage in your new PC, buy a storage hard disk or another 500GB SSD.
I've decided against going mini-ITX and I'm just going to go with a mid-tower again.
Why not microATX? MicroATX is a good balance between small footprint with good connectivity/expandability. You can easily put a graphics card, a sound card and a WLAN card on a microATX board. ATX would make sense if you wanted SLI or if you couldn't find a suitable looking case in microATX form factor.
Here's what I'd recommend:
i7-4790K $340 - Xeon is fine too if you want to save money, but 4790K with its 600MHz higher clock speed ensures better performance with future GPUs. The integrated GPU is also nice to have, you can use it for the secondary monitor or as a backup.
Be Quiet! Pure Rock $35 - keeps temperatures in check quietly (and yes,
it's better than 212 EVO)
Asus H97M-E/CSM $89 - optimal slot layout for dual slot GPU + 1-2 single slot add-on cards
2x
PNY Anarchy 2x8GB DDR3-1600 $153
Gigabyte GTX 970 4GB WF3 OC $300 AR - only trails 5-10% behind 390X but costs a lot less, consumes
almost 200 watts less at gaming load, stays quieter, and has enough VRAM for 1920x1200. The sick power requirements of 390X could easily mean $20-30 extra electricity costs
per year.
TP-Link T8E $69
Crucial BX100 500GB $180 OR
WD10EZEX $55
EVGA 650GS $70 AR
Fractal Design Define Mini $70 (great savings) +
Silent R2 120mm $11 (for total of three, the maximum number supported by the included fan controller)
= $1317 AR with the SSD, or $300 less than what you specced, even though I upgraded the CPU to 4790K. This is missing the
new SSD for the old PC though.