New build approx. £2000

[Fraservet]

Hi, thinking about a complete new build as I think I've reached the upgrade limit on my old system.
What do you think of this spec.

Intel Core I7 930
Asus P6X58D Premium MB
6GB Corsair Dominator 1600mhz ram - is 12GB worthwhile and stable?
Geforce 460 1gb x2 SLI - may be replaced with 1 or 2 485 if they are out by the time I order, must be nvidia as want to run 3d vision.
3D vision kit
Acer 24" 3D monitor
Corsair Obsidian 700D case
Corsair HX 1000W PSU
Noctua NH D-14 CPU cooler
Crucial C300 6GB/s 64GB SSD - boot drive
Crucial M225 128GB SSD - game drive (already have this)
Western Digital Caviar 1TB 6GB/s HDD - storage
Samsung 8x Blu Ray rom drive
Windows 7 x64 home
Loogitech Mx620 mouse
Microsoft Reclusa Keyboard
Rocat Sota Mouse Mat - black

It may be 2 or 3 months until I order this, but that's the general idea at the moment.

 

[Fraservet]

To answer all the questions.

I would probably get the 920 over the 930 unless prices are very similar. For some reason the 920 wasn't there when I specced it up.

I am hoping the geforce 485 - or whatever they will call the full 2 chip version of the 460 - will be out by the time I get this, so would ideally get 1 of these, possibly upgrading to 2 in sli. From what I understand 2 460's in SLI outperform 1 480, so should manage single monitor 3d well.
If the 485 isn't out, I would possibly get 2 480's instead, but would rather get the new tech.

I agree the 6gb/s hdd probably isn't of much benefit, but I put it in as it's similarly priced to the alternatives I was looking at.
It may be better to get the normal version and save the 2nd 6gb port for a future device.

 

[Fraservet]

regarding memory, I'm a little out of touch as my last computer has lasted me a few years with the occasional upgrade.

previously, filling all the memory slots on a board was quite problematic, causing problems with running fast memory and with overclocking.
what's the situation like now with this?
Should I stick to 3x2gb sticks, or is it worth getting 6x2gb?

Is there much benefit to 12gb over 6gb today, or even in the next couple of years?

I intend to do some reasonable overclocking with this setup, nothing too extreme, will having 12gb memory make this more difficult?

thanks