Mac for decent performance, beautiful apps and development environments to work in and amazing built quality. Apple always does good in hardware, but for that price, you can get a lot better.

ThinkPad, really good performance, good graphics and battery life.

And if performance is only what you care about (not $) then why don't you take a look at Razor laptops. I know, I know, that's a gaming laptop company, but there laptops are made out of the best and definitely the best laptop I have ever used. Plus they have a snake symbol on the back which is company's logo and which I love as I'm a Python programmer.