There are quite a few very good CAD programs on the Mac that are easy to use, files are interchangable with industry standard software.
There is this problem, AutoCAD is the industry standard, but they are not on the Mac yet as they don't see us as a big enough market share. Problem is we won't get to be a large market share if nobody buys Apple hardware to use for CAD.
Actually CAD on Mac has increased substancially in the last few years with the PowerMac G5. People are getting the job done without AutoCAD very well in fact.
If she needs a reliable computer, doesn't want to spend a fortune, doesn't need a whole lot of speed (not that Mac's are slow mind you), doesn't want to spend a fortune for AutoCAD (which will be taught to her when she gets a job or uses the classrooms machines) and wants to use the computer for other things without being bogged down with malware.
Your talking she doesn't want to part with a fortune for a AMD box or a Dual 2.7. So a Dual 2.3 would be a wise longterm choice as it can do a lot and all computers are going dual processor/ dual core anyway in very short order.
So get a Mac, eventually when the MacTels come out, it might run AutoCad natively or they will just decide it's too easy to pass up. Because the MacTels will have the same processors as a PC, so porting will be a breeze.
Right now the MacTels are not available, not until 2006 sometime, but by the time she is ready to upgrade, she'll have the best OS, on the most used processors and be able to run AutoCAD as well.
Why bother with Windows? She needs the computer to learn, not to battle malware. Plus with a Mac you won't be getting all the 911 calls. 😉
http://www.architosh.com/