I've decided to build a new second PC. I've bought peripherals as follows:
Intel Core i5 3470 3,2GHz 6MB L3 cache LGA1155
Gigabyte GA-B75M-HD3 (Intel B75 Express Chipset)
Zotac GeForce GT440 AMP! Synergy Edition 2GB GDDR3 (taken from my older PC)
Corsair DDR3 8GB/1600MHz (2*4GVENGEANCE CL9-9-9-24 Low Profile Blue Heatspreader
OCZ Vertex 2 SDD 64GB 285/270 MB/s + Western Digital 500GB HDD SATA II WD5003ABYX RE4 7200RPM 64MB cache.
Corsair Builder Series CX 500W Modular PSU C80+(CP-9020059-EU)
A random PC case: Tracer Vector TRO-198
Feel free to comment, suggestions regarding configuration are appreciated.