From what you've said, here's my suggestions.

1) Listen to what you've ordered. You may love it just as it is.

2) If you must make changes - try this.
a) Order a pair of M22ti's and use them as mains, and use the M2i's in another room. (or simply exchange the M2i's for the M22ti's)
b) Send back the EP125 and order a Hsu STF-2

Changing your receiver will make the least amount of difference.

Good luck, and be sure to let us know what you think when they arrive!