Is the D2 struts from accuair websites or airforce struts? Which one has the best ride quality for my 2007 Ls460?

 

I have a 2014 LS460L with 215k miles. Naturally my ride has deteriorated over the years and after bringing it to multiple shops everyone keeps telling me that everything looks good??? I find it hard to believe that's the case. Also there is a bump/rattle in the front end everytime you hit a pothole that no one seems to be able to find. I replaced the shocks at 136k and that helped but it certainly did not return my ride to it's original smoothness. What, if anything, can I do to renew my suspension to as close as original ride as possible? Thank you for any info. I'm fairly new to this (and any) forum and a newby to posting period. So forgive me if my structure, language, or placement of my posts are incorrect. May take a minute for this 'hick from the sticks' to get it but I'm trying to learn!