I've actually been test driving Silo for the past week and I have to say it really leaves Maya in the dust when it comes to box modeling. The problem is that with all the Maya updates, while new features have been added, Autodesk hasn't gone back and refined the modeling workflow which is archaic. You can get the same things done, of course, but it seems like three or four steps for every one in Silo. Silo, isn't perfect and has it's share of bugs, no NURBS or special poly effects but if you're into quick box modeling or poly-by-poly and sub-d switching, it's pretty amazing, especially for the price. If Maya had its modeling set, she'd be unstoppable.

I tried a demo of Modo awhile back and just found it very confusing coming from Maya. Had a frustrating time with it. I guess if I had a LW background, it would've come easier. It looks nice, though, and some of the tuts they offer on their site seem worth the dough.