I have HAs on my R...I used to DD it, and still drive it ~ day a week commuting in crappy Atlanta traffic. They do just fine as DD. They dont seem any stiffer than stock shocks when I have them set to "1" (softest setting). Ive been very pleased with them so far (~1 year).

BTW, the HAs have been discontinued for the ITR for awhile now, thats why you havent been able to find a place that sells them. Offer me a ridiculous amount for mine, Ill sell em