Although I don't actually have them myself (yet) I would definitely recommend 5k5s, particularly the Centre.

The difference in quality is huge partially I think because the 5k centre is rated as small in setup, 5k5 is large and produces a beautiful, deep, powerful tone. I hope your room is quite large enough to take it.

I too travelled from Ireland to demo some kit and can wholeheartedly recommend Musical Images in Covent Garden, London.

The guy there had no problem setting up a 55 system with V3 861 and 596 for me to listen to.

Damn, now you've got me thinking about that 5k5HC!
As above, let your ears tell your wallet to do.
My system is 5ks across the front, 33s at rear and it keeps me very happy. For my room maybe just the 5k5HC would do as an upgrade.

Regards,
Manus

Mostly harmless. Comfortably numb.