I have 3 MacBooks (Pro, Air and unibody white), and use as a primary machine the one that works (i.e. not in repair) -- currently, MacBook Air. I had to undercl

I have 3 MacBooks (Pro, Air and unibody white), and use as a primary machine the one that works (i.e. not in repair) -- currently, MacBook Air. I had to underclock it with CoolBook to 800 MHz so that it could work without overheating. I can't believe I spent more than $7500 for something like this.