Home demo. ProAc D48R and Spendor D9

I have the D9s in a ~ 13x17 well-damped room with 26" behind them and ~ 20" to the sides.  I get great bass from them; it is deep and musical but not overpowering.  I went to the D9s from sealed Magicos so I definitely would have been aware and annoyed of a boomy sound after making the speaker switch.    I was concerned after hearing the D9s at the dealer's slightly larger room that their bass would overpower my room and was going to try the D7s, but in the end I feel the D9s work fine in my room.

Hi Milpai, the reason is my room is open plan shared lounge room, dinning room area. 

My hi fi system is set up on the left half of this room. Speakers are set up on the long wall, so very restricted in regards how much space behind them. Unfortunately this is the only area I have to work with.
 
I am starting to realise perhaps the well designed 3 way Spendor is going to work out a bit better for me. The flow port design of this is pure genius, no boom whatsoever. Only the very deep bass is coming through, and it is so very tight and tuneful like a sealed box design.

The ProAc has to be moved out from the wall way too much to stop the excessive bass. I am seeing that in comparison it struggles a bit in comparison with deep bass vs tunefully bass. Not so with the  D9. 

And I am starting to feel like the Spendor is still in the running in phase,  given them another 20 hours or so since I get them. The treble is now starting to open up and rival the D48R in detail. Perhaps not as fast though, midrange , vocals seem to be a tie on both now, Although the soundstage is better on the D48R. But the deep bass is not as bloated and is more tuneful on the D9.

Whichever way I decide, neither will be a bad option and I am surprised how great both are with my system, taste and the build quality is superb on both.

There is no perfect speakers ,there are some strengths points for D48 that are better than the D9 and there are some strengths for the D9 that are better than the D48 , There's always compromise when choosing the right speakers for you.
From what you are describing I think the D9 integrated better than the D48 in your listening space.

I’ll be purchasing the Spendor D9.
It is just a better speaker in my room, with my system and my music taste. 

The ProAc is still clearly a very fine speaker, however I just preferred the D9 for my needs.

Sorry if I missed it but what preamp/amp are you using during the comparison?