Dynaudio Contour S 1.4 vs Special 25?

Hello everyone,
Please, help me to solve my dilemma.
Recently I heard the Contour S 1.4 at the end of Naim electronics similar to mine which is CD 5x, NAC 202 and NAP 250.2. I played some of my favorite music – hard & heavy rock, electronica, acid-jazz and I was totally convinced about the speakers.
While trying to find some good deals in the used market I realized I could stretch for a used Special 25 pair as well.
The problem is that I haven’t heard the Special 25 neither in Naim system nor in A/B comparison with the S 1.4.
Could you please describe me the main differences, pros/cons etc. of both models.
I imagine the Special 25 are more detailed but on the bright side as well which I am trying to avoid – currently I am using huge studio monitors from Tannoy DMT 15 II, which are quite revealing, uninvolving and pain to listen to bad recorded rock&roll on them.
My listening room is rater small – 12 x 9 x 8 – may be a problem for the bigger back ports of the Specials?
On the other hand Special 25 are upper in the Dynaudio’s ladder and “the best sounding monitors” according to some but will they be better for my case?
Thanks for your suggestions!
Ivo