I have posted this a lot recently if you want to search I had a thread called cheapest ever decent htcp.
Many options in there...
In a nut shell,
AsRock 1155 mobo + sandy CPU+ cheap SSD is good foundation
You can also click the link in Assassin signature above because he has an excellent guide posted as a sticky in this forum. He covers everything you need to know.
I would recommend purchasing his paid guide. It's excellent. Will answer all your questions and a bunch more you don't even know you have yet.
"Too much is almost enough. Anything in life worth doing is worth overdoing. Moderation is for cowards."