I just bought a Yamaha RX-V2400, and am planning on purchasing the following for a 7.1 setup (I've just ordered the sub today): Axiom: 2 M80ti Towers (4 ohm) 2 QS8 Surrounds (6 ohm) 2 M3ti Backs (8 ohm) 1 VP150 center (8 ohm) SVS: PSB2 ISD My quandry is that the M80ti towers are rated at 4 ohm load, and I'm unsure if I'm OK with my receiver to drive 4 ohms without any problems. Also, you can see the surrounds are 6 ohms, the rest 8 ohm. The RX-V2400 manual does show dynamic power ratings (IHF) for 8/6/4/2 ohms at 155/195/250/330W respectively. But there is nothing in the instructions that specifically states what speaker loads it can safely handle. It does have an option in the set up menu for 8 or 6 ohm speakers. In my search elsewhere, I located an Audioholics review of the 2400 that recommends NOT setting the receiver to 6 ohm even when driving 4 ohm speakers of moderate efficiency (greater than 89dB SPL). The author says that setting the receiver to 6 ohms reduces the voltage to the power section " which can limit dynamics and reduce overall fidelity". He says to keep it set to 8 ohm min. while driving 4 or 6 ohm speakers and keep it well ventilated and your just fine. The key question is am I okay running the Axioms with the different loads across the set?? I guess, I'm thinking I'll be fine given the AH review, and that the auto set up will balance the speakers dB levels fine. Help, Please!!!