I second the motion as far as recommending Wings! If you want to build basic props, or complex models, even organic ones, Wings is hard to beat. You can build stuff that you can easily use over and over, or share with others, whatever app they may use. Bryce doesn't have that flexibility at this point(maybe someday).

By the way, I recommend Drac's Wings spaceship tutorial as a great way to learn the basic commands and operations of Wings. Even a tyro like me could follow it, and I soon found myself using it all the time. I even use it in my Bryce landscapes. Oh Yes, Drac did not pay me for, or solicit my testimonial,lol.