Wing3D for an open source program is excellent. I'm using it for some Free Lance work I'm doing. Simply because I don't have the funds for the bigger apps, I have however recently got Cinema4D CE that has featured on the likes of 3D World etc. Wings though is nice and easy to learn, I recommend downloading the manual, while it's a bit of a monster it is very good, the sort of quality of manual that comes with apps you buy. While it probably lacks a lot of features the pro apps have it is however a good way to learn modelling and get soem half way decent results, as I'm finding out.