Axioms or Monitor Audio Surrounds ? =)

[4x12]

I need to shop for my surrounds since I just sold my C-R1's to the same dude who purchased my Energy system.

I was originally planing on getting the Monitor Audio RSFX to match the Silver series but the price on the RSFX are insane. The cheapest I was able to find them at (new in box) was $875 after some hard negociating. So my other option was going with the BRFX at 1/2 the price. So I placed my order over the phone today for my BRFX's but I might cancel them tomorrow... The BR's go for $550 and I got them for $485 They seem decent, and at that price I can get another pair in a few months and get 7.1 system done.

But then I thought of the Axiom QS4's or QS8's. The price on these shipped are between $480 - $585 (or $410 to $524 if I go factory outlet and wait 4 weeks) and honestly, they look damn sick! The specs seem better than the BRFX's (for almost the same price)... maybe you pro's can confirm this?

So heres the million dollar question.... I know we can "cheat" a little with the back channels and don't fully need to match the series (RS series fronts and BR series back), but what about another brand all together in the back ? Would that cause an issue ? Would I hear the difference ? Also, the fact that my front stage is set at 6ohms is it ok if I grab the QS4's since these are 8ohms ? can that cause an issue or should I stick with the same Ohms all around ? in that case i'd need to grab the QS8's.

Need some input dudes...