I Finally gave in and bought (I ordered online and it's not yet here) gaming PC! It's not best of the best but at the moment I think it's enough.

Here are the specs:

600W power
MSI Military Class 3 Z77 Motherboard (USB 3.0, Sata 6Gb/s)
nVidia GeForce GTX570 (1.28GB GDDR5)
Intel Core i7 3770k (3.5GHz) 4-core processor
Antec Kühler 620 watercooling for the processor
Kingston HyperX 2x4GB DDR3 memory (1600Mhz)
120Gb Kingston HyperX 3K SSD -levy
SATAIII 2 Terabytes hard disk
Dell 24"UltraSharp, IPS, LED, 1920x1200

I bought this indie bundle and got really good games which I have wanted to play so long: Bastion, Super Meat boy, Amnesia: Dark Cresent, Braid, Limbo, Lone survivor, Psychonauts, Superbrothers: Sword & Sorcery.

I'm also buying Diablo 3, Starcraft 2 and I'm not sure of couple more...