Revel Salon 2 is an old design, replaced with 328 that has lower distortion. If you think that this is exemplary design than pls do so. There is some additional bass extension compared to 328, but then we don't know at which distortion/SPL.Soundstage has been measuring loudspeakers for YEARS at Canada's NRC anechoic chamber. I'd say they're pros. As far as distortion, you're not going to find many loudspeakers that beat what the Arendal can do at 50 hz. The Revel Ultima Salon 2 has higher distortion comparatively at 95 db. Other than minor breakup in the midrange, these measure insanely good.
I find it funny that my 15 year old "tower" speakers that are quarter of size and weight beat brand new Arendal towers at 50hz distortion test. What is "audible" distortion in this range seems hard to define but I will certainly not take the higher distortion as something we should all accept as that is what we have been served.