Is this good to go?

[thg]

CPU Intel Core i5-3570K 3.4GHz Quad-Core Processor
Motherboard Gigabyte GA-Z77-D3H ATX LGA1155 Motherboard
Memory Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory
Hard Drive Seagate Barracuda 1TB 3.5" 7200RPM Internal Hard Drive
Video Card Sapphire Radeon HD 7850 2GB Video Card
Power Supply Corsair 650W ATX12V / EPS12V Power Supply

Are there any parts which cost a bit more but will improve performance and durability?

I'm a bit unsure of the CPU and the GPU are they alright?

Last question! What cases are good? I don't want any lights on it just something that can house all the parts.

Edit: will it be a quiet build?

 

[spirit]

Both the CPU and the GPU are great parts. A 3570K paired with a 7850 is going to be good for a long while yet! You may want a better board though, GA-Z77X-D3H or UD3H would be good.

The Corsair Carbide 300R is currently one of my favourite cases. Great cable management features and it looks sleek and stylish.