Niles is fine, but I think Xantech is the leader in hardwired IR distribution. I've used both, and preferred Xantech. FYI, Xantech and Niles have slightly different wiring protocols, so sometimes they don't play nice together, so it's best not to mix them.

This kit will probably work [Link: xantech.com]
or this one [Link: xantech.com]

You can find good prices at homeautomation.net and worthdist.com