Do not get a 64gb boot drive. get at least a 120gb
The problem is people who have done this, hit the ceiling of their boot drive, then spend a lot of effort having to micromanage their disk space and moving stuff around and being afraid even to save things on their desktop.
Not the end of the world, but this adds a maintenance headache, and your computer is supposed to make your life easier not harder.
If you want to go for the typical recommended route, you can keep your budget the same by choosing a non-black "regular" bulk harddrive, but get at least a 120/128gb ssd.