Having different brands isn't stupid at all and I agree, it gives you more flexibility to get a higher quality product in a similar price range. My constant battle (as is most, I'm sure) is to get the best performance for price, regardless of the component. If they don't match, no biggie, I'm not hung up on aesthetics like some are. I do like to keep things relatively neat in my setup, but whether one component matches another isn't neccessarily a concern.
I also agree that there really shouldn't be an audible difference in similarly designed and spec'd amplifiers, however I have experienced some variation in performance in the past. I just chalk this up to the lesser performing equipment not being able to meet their specified standards. Placebo effect doesn't usually get to me b/c I've tried so many different manufacturers over the years, I don't have much in the way of brand loyalty.
The fact that the Sunfire CG supposedly can double down for lower ohm loads does bode well, though without being able to verify this, it's tough to say it actually would in real world usage. Not saying that it won't, I just don't have the means (nor education or environment) to test something of this nature.
I do appreciate all the feedback on this guys, I'll keep both Chopin and yourself, Zumbo, in mind if I do decide to go another route w/my powering needs...

-TD