Need Help buying good PSU!

I am pretty much confused on diff. PSUs. Idon't know what to buy and which one will do all the work without any hassles.

So please help me.

My config.:
Proc: AMD Phenom II X4 965 BE
Mobo: ASUS M5A88-M
RAM: Corsair Vengeance 1x4GB 1600Mhz
GPU: Sapphire AMD/ATI Radeon HD 6670 1 GB DDR3

I want to buy a quality PSU that should suffice for this configuration.
My budget:upto 3000/-