The Paradigm Monitor, Energy Cons, and B&W 603's all sound better in smaller, bookshelf versions in my opinion. If I had to rate the ones I've heard from your list it'd be as follows:
1) Magnepan MMG
2) Paradigm Monitor 9's AND Boston Acoustic VR2's (a virtual tie, maybe slight edge to Paradigm on account of brighter sound for classical music, Boston's sound a bit warmer, preference thing)
3) Energy C-5's
4) B&W 603's

I have no idea how the kef Q5's sound, never heard them before.
I've owned the Energy's before, they served me very well, my best friend swears by the 603's.
You've got a very good list here.