Julia,

Windows emulators are not very good. Agreed.  Emulation and Virtualization are completely two different concepts, with the first one usually being very poor performance and limited. Which is why the best solution is to use a virtual computer solution, such as VMWare Fusion or Parallels Desktop or even Apple's own solution, Bootcamp.  Even in our Windows platforms, we use virtual computer solutions daily and work very very well.  
The problem is that there is very little demand for native Mac versions and certainly not enough interest to merit development to where the number of new sales would help pay for the very extensive development.
With the cost of Windows computers being so inexpensive ($200-300) on the very low end, it may be lest costly to just buy a simple Windows laptop and leave the Mac alone.