What do you think of adding EP-175 subwoofer to my M22Ti speakers ?
Will I be really happy with this combination ?
Should I go rather with HSU or another subwoofer ?

I want the best sound for the price.

I have a HSU STF-2, and it sounds incredible. Can't go wrong there, though I haven't compared it with anything else except for mass market subs at circuit city and ultimate electronics.

oh yeah, and I have the m22's as well

Gaston,

You will be delighted with any sub from Axiom, Hsu or SVS.

Please do try a search of the forums on relevant terms; it seems like we discuss subwoofers around here constantly!

You will really enjoy your M22's, especially with a quality subwoofer.