I don't like doing techno (non-organic) stuff so when I have to, I use Rhino.
I just can't deal with all the hassles of poly-idiosyncricies - way too frustrating and time consuming.
Even when I need to combine hardsurface art with organic, I do the organic model in Hexagon ('til something better comes along... hasn't for ages) and the techno parts in Rhino.
If you want to see why the new Rhino 4 blows my mind when doing hardware modeling, take a look at the little features movies at this site....
http://www.rhino3d.com/4/newfeatures.htm
Droolin' here
Achin' to get hold of this!!