I use fastrack, and I too was concerned about the noise which seemed to be a common complaint. However, the other factor that played in my decision was that not only were the switches considered very reliable, the conductivity of the track itself seemed to get very high marks.
I certainly can attest to that. When I first set up my layout, which has approximately 240 pieces of track and 15 remote switches, everything worked with just one power connection. Now that the track is permanent, I've added probably another 10 power drops just to be sure, but originally it all worked with just the single power connection. And, all 15 switches are also running on just track power.
As far as noise, I strongly agree with Renovo PRR, that you should make your benchwork as solid as possible, to try and eliminate as much of the vibration as possible. I used 2x4 contruction, with lots of supporting framework, and as suggested 3/4" plywood for the top. I also used a sil gasket between any contacting wood surfaces, again trying to reduce vibration.
Finally, I covered the whole top with "Hardwood Floor" underlay pad. It's a very dense type of foam, only about 3/16" thick. Easy to cut with shears, and lays perfectly flat. I did glue it down but it pretty much stays put, even without glue. This to me has completely solved any noise issues.
I can't comment about any other track, as I have never had any experience with them, but I can tell you that I am very happy with my fastrack set up. I'm not a true "Hi-Rail" guy, so ultimate realism wasn't a priority for me. I just wanted something reliable, and resonably good looking. I may "dress up" the look later with some ballast, but hey looks OK to me as it is.
The green stuff under the NS Tank train is the Hardwood underlay pad.
Hope this helps you rather than adding to the confusion.
REV
This shot show a lower level track, where I used standard carpet underlay. Works OK, but doesn't have as smooth a surface, and is not nearly as dense a product. The smooth surface of the green stuff lets buildings and any other accessories sit flat and level.