I cant say enough good things about silo!!  I started out modelling in wings but found silo a huge step up for the 100$ or so it cost me.  I've been using silo 2.2 and haven't used previous versions so i cant speak to the differences between 2 and 2.2.  

And for my 2 bits... another vote for SM to buy and rekindle development of silo.

Quote - I've been playing with the demo, and I'm liking it. I'm still on the fence, but teetering. Somebody push me.

Please. :)