You are quite wrong. I moved from the 17"MBP which cost me around $3000 after I got tired of the bad bettery life, heat and slow performace to a 17" Samsung Series 7, and I can guarantee that it outperforms the MBP in both speed, battery performace and it runs much cooler.
You can find many very good PCs out there if you look. Just take the fanboy glasses off. It might save you some serious $$$
I have that exact laptop for gaming. I don't wear fanboy glasses. For work, I do prefer the Mac platform though.