I'd say your tires are about half as loud, maybe less, than my SSR's. Especially noticeable that time you rolled the window down--all I hear is tire when I do that, with your TrXus's, all I could really hear was the wind.
I still love my SSR's, but then again I swapped my AT's on since I won't be wheeling for another month or so (got some mods to take care of, and some fixing-the-truck.) If I had TrXus tires swapping wouldn't even be a possility, they seem much more street friendly. I wonder how well they'll wear--if they can match the wear of something like BFG AT's or MT's, they'll definitely be a major contender. (i.e. it would be great to see 45K out of them, not 30K like other Swampers.)
And that sidewall tread sure does kick ass.