Go with parallels, without a doubt the best you can go with. Very fast and feels native.
The downside if you won't be able to use a windows manager like WMII. Because parallels provide bindings for unity that makes the whole experience smooth and they don't provide bindings for other windows managers
The downside if you won't be able to use a windows manager like WMII. Because parallels provide bindings for unity that makes the whole experience smooth and they don't provide bindings for other windows managers
https://www.parallels.com/