About a year and a half ago I put an LS932 in our 800 seat theater. At the same time we installed another snake to the mix position at the back of the house to eliminate laying a big snake down the isle. The hardest decision that I had to make for that project was deciding digital vs copper snake.
Ultimately I went 48x8 copper. Part of my reasoning was because at the time, we were still seeing some riders/shows using analog boards, and a digital snake can't feed an analog board without converting back to analog. Another concern that I had was splitting to monitor world. With the cost of a transformer isolated split, and a copper snake to my analog monitor board already spent anyway, a multicore to FOH was way cheaper than a shorter multicore jumper from the split to the digital snake plus the cost of the digital snake. I also wanted to maintain the flexibility of putting my digital desk in monitor world, and running analog out FOH if I ever wanted to. I also laid in a couple Cat5s and a couple 110 ohm lines for DMX and digital audio should I need them in the future. I was also uncomfortable with the idea of not having a back up in case the digital snake failed. If my digital board lays down, I have my analogs as a backup. If I lose a channel on the copper snake, I can swap to an unused pair. If the digital snake quits....???
If I had to do that project over again with knowing our current use and newer technology, I'd still do a digital board but definitely be looking at spending the extra coin on one of the smaller I-Live systems, which includes a stage box and CAT5 control cable. In the last 10 to 12 months we haven't had an analog board at FOH once so flexibility is less of an issue than I thought it would be. Also as I understand it, if the I-live stage rack loses connection with the surface, the DSP continues to pass audio till the connection is restored, which eliminates my concern of a failure of the snake. Absent something like the I-live or similar systems, I think I would still have put in the copper multicore.
The LS9 is a good entry level board to work with. I didn't find the learning curve to be too steep, but I've been mixing for a while. I can tell a difference between the students on my crew that learned to mix on our old analog boards and those who have started mixing on the digital board right away. My students who are comfortable with an analog board seem to understand the workflow of digital boards better.
My 2 cents
Matt