PMC Twenty 22 standmount (discontinued) vs Dynaudio Contour 20 standmount (discontinued)

The original Contour 20s are NOT smooth.

Of many dozens of speakers I have owned, the Contour 20s had one of the most oppressive tweeters that bordered on grainy. The $60 Seas tweeters in my Stirling Broadcasts were significantly smoother and more refined than the Esotar tweeter in the Contour 20s.

For a likely upgrade to your PMCs, consider ATC SCM-19s

 I’ve owned several pairs of Dynaudio’s including Audience 42,52,52SE,Excite X14 & X18’s...I have also demo’d older pairs of Contours & Confidence... IMO they were never really really good until the Excite line & Countour line of the same era..To my ears they always had an exaggerated bass and a slightly lean midrange,though to me treble was always pretty good..The year the Excites came out they shifted their voice toward a more neutral bass,richer mid range & even more refined treble..The current offerings have some of the sweetest treble available today IMO...Another manufacturer I think has a sweet treble is Dali..
I agree with your assessment of the PMC’s being a bit too neautral..You might also investigate ribbon tweeters for a highly detailed yet smooth treble or possibly add some tubes to the PreAmp side...
 

In short, I think your gear would be a GREAT match for the Contour 20 based on my having lived with the 20i for 2 years and put a gazillion hours on them (I drive mine with all tube gear...120W Quicksilver monoblocs and Audible Illusions M3B tube pre). The 20i and 20 use the Esotar 2 (20) and Esotar 2i (20i) tweeter, which are very similar, with the crossover point and bass driver being identical. The Esotar tweeter is 100% smooth in my system (cymbals, sibilants, etc are very natural), and so I have to respectfully disagree with the earlier post that this is a grainy tweeter...it is not. Keep in mind, though, that the Contour 20 and 20i do have a very slightly elevated area between 6-8K (See the Low Beats magazine measurements comparing both speakers along with sound clips of each), with the 20 actually measuring a bit smoother. On "hot" recordings, I actually will EQ my 20i's down about 2 db down in this area, and they are absolute heaven. They also have an addictive ability to play anything with complete ease, no matter the level...they like to be pushed a bit, and wow, they can ROCK when you ask them! I say go for the 20s; I think you'll be incredibly pleased.

Okay guys, thank you for all the responses. Yes, I think I will pull the trigger on a used Contour 20. I’m also going to change my preamp to tube later on, either the Aesthetix Calypso Signature version or the PS Audio BHK or the AVM. 
I will keep you all updated later. Thank you again.