Colin, there are a number of Linux fans (zealots?) here in The Lounge who will probably jump in here and tell you I’m crazy for this opinion. AND yes, there are a number of Linux distros (as they’re called) that are free for the taking, as opposed to paying for another copy of Windows. BUT, to my mind the driving force here is whether you have the TIME or the inclination to go through the “learning curve” of dealing with Linux. My experience with the OS has been brief so far, but I think it WILL take a somewhat considerable period of learning for you to do what you want to do with your new machine.
The song I continue to sing is that you are well served to stick with what you “know” and are comfortable with, in spite of its warts and the money involved. It is also quite possible that you won’t need Vista or maybe even Windows XP to equip this computer for what you want to do. Perhaps, in the interest of “funding” you could get by with a lesser cost copy of Windows 98 SE which is available for far less money than WinXP. I don’t know and obviously you’re going to have to weigh all the information that this thread yields. Good luck and do keep us posted…