Ah the old Mac vs PC debate, will it ever die
Now we have Intel Macs that do a good job of emulating PCs I guess not being able to run PC software is no longer a great argument, however where cost is an issue then a pc is the best choice.
I use my XP laptop to demo sites to clients as I can use the built in web server to handle asp stuff and xampp for the php stuff.
Sure I could upload it to a test server but what if your meeting is in a pub (my meeting place of choice

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My laptop cost about £200 so I don't mind the odd beer splash, how about your Intel Macbook ??