Regarding a metal chassis for the project - since it uses a wireless connection to my network, I can't really encase the project in metal... (Duh...) so I'll put the modem and RPi in a plastic box with power and phone jacks on one side.
Also, I've decided not to include the LCD display. Since the output is available to any browser on the network and since it's likely to be hidden behind a cabinet somewhere close to an otherwise unused phone jack, it just doesn't make sense. Also, the LCD display (the one I was testing with) is an energy hog. Less heat, fewer parts -> more reliability.
|plastic project box|