Most Engaging Monitor?

Thinking about moving to small stand mounted monitors. Narrowed it down to Harbeth P3ESR, Reference 3a Dulcet and Jean Marie Reynaud Twin. Looking for musical and engaging speakers that will pull me in to all night listening sessions and put a strain on my marriage and fatherly duties. Looking to buy used and match with my RWA Signature 30.2. I'll be playing cds and vinyl and listening to mostly rock, soul and acoustic from the '70s.
Price wise, used JMR Twins are great at around $5-600. I haven't seen any used Dulcets in a while. The Harbeths would be the most expensive as would the classic Rogers LS3/5a. Placement would also be an issue. Sealed cabinet or front ported would allow me to use the speakers closer to the wall.
interesting thing about the LS3/5a I read recently that the older models have a smooth rise of about 3 db in the 1000 hz range (if my memory serves me correctly) I am not talking about the built in bump at 125 hz, this is something that happens over time when the speaker is several years old. Not that every speaker out does not have this bump, I thought it was interesting about the LS3/5a...
what is musical to someone can be too subjective.
There are lots of dependency out there all the way from the source -> cd player or vinyl -> cables -> preamp -> amp -> cables -> spkrs -> ears. Anything mismatched can sound bad while any matched good sound great.
one should ask:
high freq response:
mid range response:
Low freq response:
sound stage:
room size:

so back to your question:... my answer would be it dpends..
what amp are you using to drive?
what spk and interconnect are you using?
what stand are you using.
I personally prefer professional studio monitors as they are more engaging and accurate to me.

Before shooting in the dark, please try to audition and purchase from someone local and deal with it face to face.