I don't know what you want out of this new computer you are looking for. But i'd still have to say PC. Even if you do wan't it for video/music editing i'd still say get a PC.
Unless you are a film director or something and you are looking for that little extra. :-? :-?
But Windows Movie Maker and meny others have everything you will ever need on them.
And i would even disagee with Macs being the most user freindly, (only 1 button to click on the mouse so it look's nicer. Not to make it more simple, you actualy have to use the keyboard for a right click!)
All it is a more colourful and freindly looking GUI.
Also it depend's how long you have been using Windows for. If your quite experienced with Windows you will find the Mac very frustrating, ALL keyboard shortcuts have changed! even Alt+Ctrl+Del! (I'm not sure what it is now, but if you find out let me know!)
And as for errors, I've always thought of it being like this:
On a PC you may open and do pritty much what ever you like with any file,
on a Mac the settings and files you may use are limited (which probaly a big reason why hardly no one writes virus for Mac).
On the other hand if you do find any problems on the Mac your probaly not going to have any luck putting it back right without reformatting!
Well.. that's my rather long and biased review
I have been using Mac's for about 2 months now, and the ones im using are buggy and freeze up all the time,
and no admin's have even atempted to try and get them running properly again...
Sorry if it's too late and you already bought one, and all I have done is insulted your new computer!