Hello,
I have demod the 3005SE against the MT-30, so thought the experience might help, (as MT-25 is MT-30 with a lesser sub).
I wasn't so impressed with the MT-30 for high frequencies. Things like bullet cases hitting the floor, cymbals an so on, sounded dead compared to other speakers. And for music things like violins seemed strained.
However, the bass and mid-range on the KEFs was terrible for music, which seemed mainly down to the sub, while for films it seemed OK.
The top and bottom of it was that I thought the satellites in the 3005SE were better than the MT-30, but the sub in the MT-30 was better than the 3005SE sub, (but only significantly noticeable in music).
Given that the sub in the MT-25 is a lesser version of that in the MT-30 the 3005SE might very well be a better bet, especially if you aren't interested in music performance.