James - I hear what you say and I'm sure that you and others who've had the Mana "epiphany" are not making it up and that you are hearing real and incredible differences however, for the hassle involved in getting to try it out here in Portugal it isn't worth it for me.
I've tried other things on spec, usually though after the strong recommendations of friends who's opinions I trust. None of my "hifi" friends (all people I've met in person and who's systems I've listened to) have particularly strong opinions on any kind of racking or isolation so I'm not willing to go out on a limb to try it.
If that's my loss, then so be it. I'm very happy with my system as it is anyway 
Michael.