I am wondering if someone can offer me some advice with regards to Martin Logan Preface speakers (Front L/R) and ML Encore (C/surrounds), Sub ML Dynamo 700. I am wondering what would be a good receiver to match these, considering the fact they are 4 ohms. Right now I have a Pioneer elite sc-25 (which can still be returned, if needed), but I am wondering if a Rotel RSX-1560 would provide more or the correct amount of power to these speakers. Right now I am thinking about running the Pioneer elite sc-25 with an Emotiva xpa-3 amp. Powering the Front L/R and center with the Emotiva and using the elite for surrounds. However, another idea I have is to use Rotel seperate Processor and amp (RSP-1570 and RMB-1575). Any thoughts on this would be greatly appreciated.