Well just for recording the 16 in and 4 out on the new US-1800 fills the void I was having with the UX8 but the band has also been using the UX8 live for several years. The problem we always had with it though was not enough ins and outs where we would have to submix crap through a rack mixer and then have no remote control over it so I just picked up the tascam to try and remedy the situation.
What I am looking at in a live environment is enough ins for everything and the same # of outs to feed to house + 2 for stage.
What it comes down to though is Line 6 made a good driver for mac and not windows, where as Tascam did the opposite and the Mac driver is junk.
So if I had two UX8's I would be able to accomplish this in OS X, or if I had two US-1800's it would be possible in WIndows.
I would rather use neither and run Linux but once again these companies will not support it so all efforts in a usable driver is from reverse engineering.
Anyway I came up with my own hack / workaround allowing me to have 22 inputs and 10 outputs by running a couple different programs simultaneously.
Now I can plug the Electric, Acoustic, Bass, Mandolin, Violin & Accordion / Keys all into the UX8 with individual outs and 1 master out through the digital interface to the Tascam where I will have all my mics plugged.