Which one will be better? Will be used with Cerwin Vega V-10F and V-6F speakers. Please help me with some advice, as I have no chance to hear both of them right now... I've heard about some "cracking" in channels on Marantz, but it is not a common problem I suppose? And possible option is still NAD T742, but it would be nice to have 6.1, isn't it?