Vandersteen 3A Sigs vs Klipsch Forte III

The Vandies will smoke the ADS, in my opinion. The Klipsh, again in my opinion, work best in large rooms.
That being said, getting a recent iteration of the 3a sigs would be the way to go. Unfortunately, Vandersteen doesn't keep records of when a speaker is created, so you have to go by serial number. (This is if you are buying used). 
Another strategy is to buy a pair of 1Ci's and a pair of 2wq subs used. 
The cost will be almost the same and will get you a bit more than a pair of 3a sigs in terms of sound.-And, they take up less room. The Sound Anchors on the 3's are impossible to work with in limited space.
B

Well
no hater for sure with 3 pair of Vandersteen and a pair of rebuilt and upgraded Cornwall in the garage...( but they at one time occupied space in the “ Vintage” room...
Apples and Octopus... not oranges....
and yes I had a pair of 3a-sig with Mac power....
i would say Vandersteen faults are subtractive and Klipsch faults are additive with glare, fatigue and lack of image depth critical listening deal killers for me. Wow do they rock tho! I have run them with a MAC 240 and tubes certainly help tame some of the issues.
you have enough amp for the 3a and a nice sized room. They reward meticulous setup and careful placement using the massive sound anchor stands.
the acoustic coupler provides very significant low bass and superb definition with an amp that can control the low end drivers,
have fun in your search, and Apple or ???? It’s all good food

Tomic601, "glare and fatigue", ya, I get it. I guess I want that pair of "do everything well" speakers. I like soft, low level music sometimes and then I get in the mood to really crank it up and feel the music. That's where I thought the Forte III's could handle it all. But glare and fatigue worries me. Can you blast the 3a Sigs and still have good definition?

yes the 3a will rock and do so with a higher duty cycle than ( for example ) a 1ci / Vandersteen sub combination as the very robust midrange takes load off the tweeter.

i have a pair of 1ci that I run with a NAIM Atom (40 wpc) and they are very sweet....

I did run the 3 with a 200 wpc Mac ( MC202) in rooms somewhat smaller than yours ( but close volumetricly close)...Something like Gabriel Plays Live....shaking the tree will move ya...

you could also get a minty new pair of 2ce sig II  which offer a ton of value ) and then add subs later and really have a fantastic setup.

Hey tomic601,
How's the Treo CT set-up doing? Did you add sub(s) to them? Really envy you. I have a daughter in San Diego. Would love to hear your system(s). HInt, hint :-)