speakers for small room

For $10000 I would go for the TAD ME-1 on sale in audiogon.

https://www.audiogon.com/listings/lisb6f60-tad-me-1-micro-evolution-one-monitors

…or if you can stretch it.

https://www.usaudiomart.com/details/650009173-borresen-01-speakers-w-darkz-t2s-and-stands/

I recently set up another system in a similar size room (10x14).  I use the QLN Prestige One.  They are easy to drive and your Accuphase and other gear will be a great match.  As a matter of fact the dealer who sold them to me recommended Accuphase electronics.  They do very well with large scale orchestral.  I listen to classical with my morning coffee almost every day.  They are also within your budget.  Part Time Audiophile has some online reviews you could check out.  Based on what you describe you’re looking for I think they’re right up your alley.

Mihorn

evaluate speakers via a video !  Madness I say, madness !!!!

"The room is 13’ x 11’ with 3 walls, the other side opening up to the rest of the house."

If I understand correctly, one side of your room is effectively a large opening into the rest of your house. If this is the case, then in the bass region your airspace is effectively your 13’ x 11" room PLUS "the rest of the house". This is good from the standpoint of modal effects in the bass region, but challenging from the standpoint of moving enough air to generate good bass impact.

Is the missing wall on an 11 foot side, or on a 13 foot side?

"Would a floorstander be too much?"

It depends on the specifics of course, but imo a floorstander is more likely to do what you want than a stand-mount speaker is, if I’m understanding correctly about your room essentially "missing" one wall. Imo some way of adjusting the bass characteristics of the speaker would be desirable.

"I’m looking for something more dynamic and something that can push more air to give me that grand experience of listening to big works."

What are your constraints as far as loudspeaker enclosure size goes?

And, what are the constraints on placement of those speakers?

Is this primarily for just one listener, or often for multiple listeners?  In other words, does the width of the "sweet spot" matter? 

Ime "that grand experience of listening to big works" is enabled when the spatial characteristics of the recording are perceptually dominant, as opposed to the "small room signature" of the playback room being perceptually dominant. To put it another way, envelopment/immersion is already on the recording (assuming it’s decent), and we want to keep the room from masking that. Briefly, this can be facilitated by minimizing the early reflections while encouraging the later-arriving reflections (and I can explain why if you’d like). Which leads to my next question: Can you orient your system such that the opening into the rest of the house is behind your listening position?

Duke