I have a Storm III and it is nice... I always long for more definition with sub base - I made the mistake of listening to the Studio III - kind of upset my "apple cart" :). I would just wait and get the Stadium III (used for less $$) when you have a chance... I am not familiar with the M&K so I cannot comment on the differences vs. the REL ST line...
May want to consider 2 subs if your main focus is music...
A friend tells me that 2 properly configured Vandersteen 2Wq subs work GREAT for music and the jury for Home Theater... as there are possible HT processor issues in his system... Since it sounds like you may be in the middle of a wait - send me an E-MAIL and I will let you know when my friend has his HT figured out...
May want to consider 2 subs if your main focus is music...
A friend tells me that 2 properly configured Vandersteen 2Wq subs work GREAT for music and the jury for Home Theater... as there are possible HT processor issues in his system... Since it sounds like you may be in the middle of a wait - send me an E-MAIL and I will let you know when my friend has his HT figured out...