Carlon also makes various sizes of "smurf" tube in orange, the standard color for LV wiring, along with all the bits to do just about anything you'd want, like backless junction boxes, connectors, adapters. Here's a 2-page overview of the Resi-Gard line:http://www.carlonsales.com/techinfo/...ng/IT-7F72.pdf
In our area, Lowes and HD have the 3/4" orange size in pre-cut 10' lengths, like the blue. Rolls are available from many places if you need a continuous run longer than that, or larger sizes.
If you are considering a new LV install before the drywall stage, the orange color would be worthwhile to distinguish the LV runs from anything else being installed.
I have no connection with Carlon; we used a lot of the Resi-Gard gear in our house to try to future-proof the LV wiring. Every LV wall junction box has an empty 3/4" tube up to the attic, or down to the basement (or both in a couple of important rooms), and there are several 2" runs from the structured wiring cabinet up and down too.