My first gaming rig, need help.

Hey, I'm making my first gaming rig and have found some parts which go under my budget and seem to go nice. I'm just wondering about compatibility with everything so i'm checking here with you guys. I'm looking to buy this stuff soon as i have the money and i'm using amazon to supply me.

I would like to stick to intel and nvidia. I was also not sure about going with the i5 2500k or the 3570k.

Mobo:
Asus P8Z77-V LX Motherboard
http://www.amazon.co.uk/gp/product/B007KZQE7Q/ref=ox_sc...

PSU:
OCZ OCZ600MXSP-UK ModXStream Pro 600W
http://www.amazon.co.uk/gp/product/B001GLFD54/ref=ox_sc...

HDD:
Seagate ST31000524AS 3.5 inch Barracuda 1TB GB 7200rpm
http://www.amazon.co.uk/gp/product/B004HBAGSO/ref=ox_sc...

CD DRIVE
Asus DRW-24B5ST 24x Internal SATA DVD Drive
http://www.amazon.co.uk/gp/product/B007IKS7AU/ref=ox_sc...

CPU:
Intel Sandybridge i5-2500K Unlocked Core i5 Quad-Core Processor (3.30GHz, 6MB Cache, Socket 1155
http://www.amazon.co.uk/gp/product/B004FA8NX2/ref=ox_sc...

Case:
Zalman Z9 Plus Midi Tower Case
http://www.amazon.co.uk/gp/product/B004FPQL0E/ref=ox_sc...

RAM:
Corsair CMZ4GX3M1A1600C9B 4GB 1600MHz
http://www.amazon.co.uk/gp/product/B004RFGALC/ref=ox_sc...

GPU:
Asus 1GB GeForce GTX 560TI DirectCUII PCI-E
http://www.amazon.co.uk/Asus-GeForce-560TI-DirectCUII-G...

Would this setup be ok?

Would everything be compatible?

I am in need of a OS and was just wondering where i could get a torrent (windows 7) for it because i dont fancy buying a new OS?


Thank you for taking the time to read this and help me.

Many thanks, Kieron.