Given Avalon Eidleon is considered one of the best

Chazzbo,
This is an interesting thread. I had a similar experience in ownership to that of Tireguy; my Radian HCs "left me wanting more". For me, the more was MORE INVOLVEMENT.
Many blame the Spectral electronics that I used with the Avalons, but I read/heard much that these pieces were designed to be used together. After a couple of months listening, I sold them and am very glad I did.
Now having heard a friends' Eidolons with great OTL amplification, it makes me wonder what the Radians would have sounded like driven by some OTLs. FWIW, this man's opinion is that the Radians and most of the lower priced Avalons I've heard(Opus, Eclipse, EclipseII, Symbol) all share the "Hi-FI" pyrotechnics, but don't do the best job of drawing you into the music, and making you want to listen to more. When considering ownership of any of them, I'd highly recommend longer-than normal auditions, preferably in your own system. Also, tubes vs. ss amps will have a big impact on your results. Cheers,
Spencer

I recently purchased the Ascendants, I have never owned
a more involving speaker, powering them with a pass x-350.
Compared them to B&W 803D, Maggie 3.6 other speakers
I've owned Proac,Dunlavy,thiel.
My audio friends have all been very impressed after a listening session.
Give them a listen if you can.

I have had Thiel 7.2, Eggleston Andra, Dynaudio C5, Temptation, B&W and some others. None of them gave me as much satisfaction as the Avalons. I am trying to get the scratch for some Avalon Eidolon Diamonds!!

Behem,
I have auditioned Avalon Ascendant with Ayre amplifier, and the sound was very impressive especially in stage and tonal balance.
As you know, Ascendant costs much more than studio pro, but your posting seems to be that the sound of Studio pro is similar to Ascendant.

I don’t really care about the look and finish, but I care the real base( not boomy) and sound stage.

My local dealer does not carry studio pro, so I can not try them, so please share with me if you have any opinion.

Meaning no disrespect,this business of "house sound" is a bit silly.The system is dependent on the Amp/speaker interface,the room personality,and the associated equipment being used.After that,it is up to the experience,and skills of the owner to take it to the max.
I own,and love,the Avalon Ascent-mk2.It is a superb timeless design,of true Heirloom quality.Easy load(a BIG deal),external crossover,sealed enclosure,that is massive.This surely would be far more costly,in today's market.
Upon Avalon's about face,on the subject of porting vs sealed enclosures,what I did,to stay abreast of their quest to satisfy the "bass obsessed",was to add a REL STENTOR,to the system.I did this at the criticism of my audio pals,yet it has worked out incredibly well.It has allowed me to keep the advantages of this stunning sealed design,while adding a real Wallop,and depth.However it took me a long time to correctly voice,with absolutely NO seam.
I am now looking into adding a superb super tweeter,to stay abreast of the new tweeter technologies,and keep my system competitive with the best the New Avalon CO has to offer.These add on designs do exist,if one does some homework,and some are better matches than others.I have heard almost all models of the newer Avalons(which are all fine,IMO)and am very confident in my decision to take this route.
What I have been able to do(thanks to a good,dedicated room)is save BIG TIME MONEY,as opposed to going through the "buy and sell" syndrome.Technology can be a real benefit,if one stays abreast of what's available to us.

As to the subject of some Avalons lacking the last degree of bass response:How come we have NOT seen so much attention payed to this subject,with the "industry darling" Kharma 3.2's???Fine speakers,but like the rest of the superb Avalon line,the overall strength of the speaker takes precedence over the lowest octave.True music lovers should know(do know)this!

Best!