Actually, you aren't correct. AMD's architecture is different from Intel. They go with shorter execution strings to cheat "faster" clock times. AMD is less expensive for a reason. Intel i5 is the way the go. Plan on about $300 for a good
i5-3570K is the way to go for top end chip. You can get a good motherboard for about $200. I wouldn't bump the m/b up to $300 and would instead spend that on the better cpu, or better video card.