Hiya.

Hit the net, find the companies, try the demos. Probably the only way to really find one you like. Off the top of my head, try looking into:

Hexagon ( http://www.daz3d.com )

XSI Foundation ( http://www.softimage.com )

Lightwave ( http://www.newtek.com )

Silo ( http://www.nevercenter.com/about/ )

Zbrush ( http://www.pixologic.com )

trueSpace ( http://www.caligari.com )

Milkshape ( http://chumbalum.swissquake.ch/ )

Have fun!