purchasing

Well boys, as I'm sure you have seen (or not seen) I haven't been visiting the boards for a while, I don't have a computer. So here i sit at my parents computer looking through stocks of computers and wondering just what to get. I know some of you techies on here (that means you Smith and Cuc)...

I know this has definatly been asked before but what program should i be purchasing for modeling 3d objects?