Use blender. Really. It takes a while to get used to, but there are sweet tutorials (yes even video tutorials) around to teach you. Once you have it up and running, it'll go goddamn fast.
It can be used for a lot of other things, too... physics stuff, animations, ... Really big fun. But, as I said, don't get discouraged when you start it the first time . It'll take a couple of intense hours to learn, and that's only the interface .