Don't forget Carrara.

There's lots of good looking Renders in Vue at the moment because that's where most of the natural landscape render fans have ended up (there's also a lot of crap coming out of Vue; it's the artist not the brush, etc). Vue undoubtedly has the lead and the momentum - but then so did Bryce at one time...

Check out this gallery to see one artist's progress with producing vegetation filled Carrara scenes:
http://www.renderosity.com/mod/gallery/index.php?browse&user_id=237321