How about running cabling yourself and terminating the cable yourself?
All these solutions are fairly expensive, but when they ran your phone lines, Ethernet lines, and cable lines in your home, all those wall plates and connectors weren't already on the ends of the cables before they were run! The ends of cabling, including RCA connectors, are fairly easy to put on and there are even some products out there which basically require no tools at all. Just a pair of decent scissors and a small flat head screwdriver can do the trick.
This is what I would recommend...
http://www.planetwaves.com/ce_home.html
I use these for about 1/4 of all my cabling in my home and on several of the installations I have done. More often, I use mini-RGB cabling from extron, but this is more difficult to terminate and requires some specialty tools.
Likewise, if you only have 3/4" conduit, you can't actually FIT HDMI through it. HDMI has a requirement for a minimum 7/8" conduit - go figure, the most common home conduit it 3/4"... 1/8" to small.
So, for the money, and for the quality, I would not get a CAT-5 balun, but would use decent coaxial cables from Planet Waves. You can pick up specific lengths online, like at eBay. PM me if you have a specific question.
I know that this is a product that Audioholics has seen, and when I asked about it they gave a fairly postive review to me which led me to start using the product.