Upgrading CPU & Mobo

[yabadaba]

Hey, I'm looking to upgrade my current setup for a more powerful processor, my current mobo has issues with onboard sound and uses the marvel sata3 controller and I'm planning to start streaming Games online (mainly Starcraft)

Current Setup:
Asus Sabertooth x58 with i7 950 (Corsair H70 Cooler)
12GB Corsair Dominator 1600Mhz (6x2gb), AMD HD6970
1TB Western Digital Black Caviar (Storage), 60GB OCZ Agility 3 (OS)

I would like to have a Micro-ATX board and will be overclocking if I need the extra performance.

I was looking at the i7 3770k and Asus P8Z77-M.
Budget is around £375 for Mobo and CPU.

Also will I be able to use 4 sticks my triple channel ram on a dual channel board? if not.. will G.Skill RipJaw 8GB 1333Mhz be sufficient?

Open to all suggestions, Thanks!

 

[yabadaba]

I'm thinking about getting a Thermaltake a30 lan case and ill be using the H70 if it can fit. MicroATX also seems to be cheaper most of the time.

 

[yabadaba]

The Case will not be part of the budget but I would like to stick under £100 and I probably have my H50 hidden somewhere.
I think the i7 would be much better for me because I will be streaming and the programs I use will benefit from hyper threading.
Although if the i5 3570k will be fine for Streaming games at a decent in-game fps (60+) then I would consider it.

 

[yabadaba]

I meant that I have an H50 I can use (if required).
I think I will be getting the build that Honosuseri posted.
but isn't mini-atx differant to micro-atx?