Silo is quite possibly my alltime favourite modeling software. Okay I have not tried Maya, but Maya is, like, a Swiss army knife, right? While Silo is a dedicated modeler, and oh boy do I prefer dedicated apps. Oldschool, yeah, I know.
You can get the trial at the link above, and if you like it, Steam offers a good deal price-wise (supposing you’re okay with Steam, of course).
It hasn’t been updated in a while, so everyone used to think it was dead, but nope; it lives, and the 2.3.1 update even includes this:
“Exported OBJs should play much better with Substance Painter.”
How cool is that? =)