Final check for gaming build

[bumsrus]

Just a quick check before ordering parts. Suggestions welcome. My requirements are:
Gaming build.
4k resolution and be able to play games on highest settings.
Will be using for VR.
Budget roughly £1400

Been recommended by one of u great guys this spec :

http://uk.pcpartpicker.com/p/YbZQXL

i7-6700K 
Noctua NH-U9B SE2 37.9 CFM CPU Cooler
MSI Z170A GAMING M5 ATX LGA1151
Corsair Vengeance LPX 16GB (2 x 8GB)
Samsung 850 EVO-Series 250GB 2.5 ssd
Western Digital Caviar Blue 1TB 3.5" 
EVGA GeForce GTX 980 Ti 6GB Superclocked+ ACX 2.0+ Video Card 
NZXT S340 (Black) ATX Mid Tower Case 
EVGA 750W 80+ Gold Certified Fully-

A few questions.

1. Can anyone recommend a psu which would be powerfully enough, if I was to sli the gpu in the future?

2. Recommendations for a network card and optical drive

3. Do I need a sound card if I am sending audio to an AV Reciever for surround sound?

4. Recommendations on a funkier case with a few leds?

Thanks guys.

 

[Forever Oleg]

That is a very nice build. Althout I believe ASUS Z170-A would be a better choice for the mobo, the M5 is great as well.

1. 750W should be enough even for 2-way SLI but I would pick up a 850W or even 1000W PSU to be safe as you will be breathing into the ceiling + if you want to overclock.

2. Optical Drive? Well, that case can't fit one. This is a good wireless card for cheap: http://uk.pcpartpicker.com/part/tp-link-wireless-network-card-tlwdn4800

3. Have no clue.

4. This one is a good case, no LEDs though: http://uk.pcpartpicker.com/part/nzxt-case-caph530w1

 

[g-unit1111]

1. For SLI'ing a 980TI I would get this no question: http://www.newegg.com/Product/Product.aspx?Item=9SIA24G28N1703

It's a bit more expensive than the G2 but I'm being told the 1KW and 1300W variants of the G2 are using inferior capacitors vs. the 750W and 850W models, which is a shame.

2. Don't need either - what's built into your motherboard works fine, unless you're talking wireless than that's something different. The S340 can't use optical drives since it doesn't have the bays for it.

3. No.

4. Most of those cases are pretty much from a lot of manufacturers that make a lot of junk products. If you want LEDs, stick with the S340 and get yourself a Hue+ controller with RGB ligthting. It's only like $50, not a major drop in the bucket. That's the way to go.

 

[bumsrus]

Is this the kind of thing you mean?

And yes wireless is what I will be needing.

https://www.overclockers.co.uk/nzxt-hue-rgb-dual-channel-led-controller-black-ca-174-nx.html?gclid=CjwKEAiAw4e1BRDfi7vghaWU9jESJACzo9jub8Ag35J_YT23fOjtKqe_7ZJysZyIsMZN24S4SpVyixoC_tjw_wcB