KEF 104/2 vs 105/3

what amps are good with the 105.3 speakers? (Mine sounds sounds loud compared to previous speaker)

I currenently own both 104/2's and 105/3 and have to say that the 105/3/s out perform the the 104's in every level, detail, weight and clarity. They produce a much bigger sound and will take you further with better components than the 104's. However The 104's are more room and system friendly.
I have never used any of these speakers with the cube.

I would love to hear all these against a set of 107/2's though!

I have owned 102/2s for years, and was looking for a larger speaker. I considered both the 104/2s and the 107/2s. I noticed that the 104/2s seem to have a fanatical following, and I was going to use a Velodyne HGS-15 for LF below 80 Hz anyway, so I decided on the 104/2s. I use the 104/2s with the HGS-15 for stereo music, and add 102/2s and a 200C for movies and some HDTV. I now count myself among the fanatical 104/2 following. They really are wonderful speakers, expecially nice for jazz and chamber music, where imaging and timbre are so critical and comparison with live performances so easy.

db