a 4690k is a better bet. higher stock speed and can usually be overclocked from 4.4 to 4.6ghz without much trouble. If you want a laptop then get a laptop, but laptops and desktops really are apples and oranges. A desktop is typically more powerful/faster but lacks portability. It's a tradeoff.
You mentioned building a computer, do you already have a desktop that needs upgraded or do you need everything including keyboard, monitor, mouse, speakers etc?
As a side note, if you want a macbook for $1000 from what I can tell you'd be getting a 2.5ghz dual core i5, 4gb ram, 500gb (small) 5400rpm (slow) hdd - other than portability, I see no perk. For that same $1000 you can have an overclocked 4.6ghz quad core with 8gb ram and a larger faster hard drive with better gpu.