First question: are yamahas considered "high current" receivers, like the way HK advertise their receivers? What about Onkyo and Denon? What would one consider is the minimal amp rating to be considered "high current"? I am talking about both lower end HTR-5550 and mid level RVX 1300. Second Question: I am thinking of getting a HTR 5550 for the Bedroom as a low cost solution to run 4 ohm speakers (Magnepan) since it has a switch for 4 ohm. Is this adequate? or should I get something better? I currently have a Kenwood VR-357. On the speaker terminals it says 8 ohms speakers only. Can i safely run 4 ohms on this receiver? As you can see i am on a budget.