Thanks so much for doing an extensive research for me.
Looks like i have overpaid around $100. I have ordered the system from a PC builder (computerlx.com). It would cost me $70 for someone to build a good system for me, because i do not know how to.
Honestly, buy the parts and follow the instructions in the motherboard manual. It is really that simple. Windows installation is fairly straightforward (there are some advanced things you could do, but that is more for power users). Building computers is my hobby. That extensive research took me 10 minutes.
The problem there is no room in my house, i can't even put 2.1 speakers next to my TV and i am not kidding you. As for installing OS that's very easy. I am into software IT for about 16 years.