Salut, you could always try running a live cd Linux to test if your problems are hardware or software related. I recommend ubuntu right now http://www.ubuntulinux.org/download/

For osx, I like it miles better than windows, but it is not flawless. For instance, the speed of osx is really fine only if you have over 512mb of ram. You also pay more to get a mac, but it is worth it IMO. Great interface, great software, easy, plug and play, and the best multitasking. Games are slow on osx though. There are always tradeoffs.

Ciao

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