Looking for a £800/900 build

[EarlGrey]

Hello everyone

I'm looking to build a gaming pc for around £800 (maybe able to push to £900 depending on how much it would effect the performance of the pc), also will need an OS to be included. Would be great to have a build that I can upgrade and add to.

I live in the UK/London, looking to buy ASAP - would anyone be able to help spec one out for me?

[B]PC Case (needs to be included in budget)[/B]
What i've been looking at but [U]open to suggestions:[/U]
NZXT Phantom 410 White Case
or
NZXT H440 Mid Tower White/Black

[B]Ill buy separately:[/B]
will buy the keyboard, mouse, speakers, monitors.

looking to have a dual setup with either two of these HDMI monitors:
AOC I2769Vm 27" IPS VGA HDMI Monitor
or
BenQ GL2760H 27" LED DVI HDMI Monitor

[B]Single/Multiplayer Games I play:[/B]
Call of Duty: Advanced Warfare
Farcry 4
Assassins Creed: Black Flag
Battlefield 4 (online)
ARMA 3 (online)
Company of Heroes 2

[B]Applications I Use[/B]
3Ds Max 2013
Unity
Adobe Cloud (illustrator, Photoshop mainly)

Any questions please give me a shout.

[EarlGrey]

That's great thank you for your help, do you think 8GB memory is enough?

And by looking at spec i'm guessing this rig will run most AAA titles for next 2 years or so?

off topic:
Colleagues at work are on here and recommended I buy a gold membership to help support the forum, I read a lot but don't really post until now.

[EarlGrey]

ok thats great cheers, all I need then is to buy the OS which I'm guessing would be 64bit, windows 8?