I know form my own experiance that the Pioneer Elites WILL handle 4 ohm speakers with no problem.
a friend said the same thing... this was one of the reasons I am leaning towards the 54

The ONLY reason I would choose for going with matched speakers for mains & surrounds is for multi-channel audio. If that's what your putting this system together for then I would consider it. It is absolutly NOT nessasary for Home Theather.
Thankyou as I was not sure about this...
I will mostlikely get a smaller set for surrounds (chorus 706 s)... if I want to upgrade in the future, I can always use the 706's on my computer