Wow, those are 3 fairly interesting speakers you have there. Would you care to compare and contrast them. I have heard the Kef 105/3 a long long time ago.
Well, the RF-7s are the best of the 3 for home theater, due to their sheer dynamics. I've owned pretty much everything in the Klipsch line (KLF-20s, 30s, EPIC CF-4s, Heresy's, Chorus, Cornwalls, La Scalas, etc) and fine the RF-7s to combine the best of horns (dynamics) and the accuracy of cones. They also sound great for 2 channel listening with tubes as you can still get a good presentation even at low listening levels late at night. For HT I used the matching RC-7, KSP-S6 surronds, and SVS 20-39 sub.
The Maggies have a great, layered presentation. Very deep, very 'open' sound. A little deficient in the bass but a joy to listen to.
The KEFs are really the most technically accurate of all 3. Great bass, accurate mids and sparkling highs. The midrange and tweeter head assembly can be adjusted (rotated) towards the listener. I'm currently using these in a bedroom system with a B&K ST 140 amp and L-10 preamp and Panasonic DVD-RP-91. I know eventually I need to scale back on one of my systems as my spouse suspects I'm secretly running a stereo shop
Regards,
Dave