I voted for Lightwave.
Probably the users among Modo and Lightwave are more or less the same, but I would not do too much reliance with the poll whatever happens...I think with the new release LW will be great with a lot of new features, extending very the future prospects. To have a chance to integrate Corona is not only very interesting and usefull for all archviz users (like me), but it's to be a part of something new and solid.
Furthermore Lightwave is widely used in VFX...sure more than Modo. So should be very interesting to see how it works also in that field and not only in archviz.