Hi,
Some floorstanders would (maybe) give you a little more bass but nothing can beat the M22 in the midrange details at USD 400. And the M22 bass is pretty good and tight (for my taste atleast).
Someone posted a couple of days back stating that 'For $400 they're amazing! Axiom squeezed every penny of that $400 into those speakers! and that pretty much sums up my view on this.
I have heard the Mission M73's playing at a store 6 months back and own a pair of M22. The same store was selling some other Mission M70 series speakers (bookshelves) in Hong Kong for less than USD 100 a pair and I was tempted to pick up a pair but held off and I didn't regret the decision.
The M22 midrange details are clear, precise and they stay that way even when played at higher (louder) levels.
I dont recollect being that impressed with the Mission M73 speakers when it came to details. That is what I look for when auditioning speakers.
I have heard some Tannoy's too but dont know which ones (they looked like the MX3's but not sure of which model). Dont mean to be picky but at the Tannoy showroom, they seemed a bit light weight from the looks and feel.
Axiom M22 bookshelves weigh 7.25 kgs each
Tannoy MX3 floorstanders weigh 9.5 kgs each
Axiom M40 (entry level floorstanders) weigh 13.5 kgs each
I dont know when and how I got this idea into my head (maybe on this board ?) that speaker weight and construction are major factors in the sound quality so you may want to ignore this bit.
I think the best way is to listen to all and then make a decision. Good luck
