New Speakers

[f1eng]

Just to add a part of me thinks with my room and speaker placement limitations that maybe the 23s are sufficient.
That maybe throwing extra cash at it will not bring about much of an improvement ??

IME the thing most effecting SQ is the room and the position of the speaker in it.
Even quite modest systems can sound superb in the right room if they are placed optimally.

Unfortunately, the best place for a speaker, particularly a wide band one, is almost always well away from walls. There are a few makers who have designed their speakers to go near walls or even in corners which will reduce the negative effects.
Naim speakers used to be designed to be used against the wall, but still benefit from being well away from side walls. Their more recent designs are free space types though.
Audio Note UK adopted some old Snell designs which work extremely well in corners. The AN-E and AN-K sound very much the way you are describing you would like IME. Well worth a try if room position is fixed.

OTOH you have a superb system already and it may well be that, as you write, if the room layout and furnishings are fixed, you may well have gone as far as you can SQ wise and it will only be worth buying more kit if you fancy the kit for the it's own sake....