I have just pruchased Jamo's THX Ultra2 D7PEX (7.1) speaker package and am about to uprgrade my amp. I have £6k to spend and was looking at the Arcam AV8 And P7 combi as it has recieved great reviews and is also THX Ultra2 certified. I also thought about the Pioneer VSA-AX10i (could end up saving some cash)but after reading on the forums that its susceptible to cutting out when trying to drive 4ohm speakers (the Jamos have 4ohm impedance), I decided against it. I did have this confirmed by pioneer who said they dont recommend it where every single speaker in a setup is 4ohm. So what else can people recommend or should I just go for the Arcam offering? Movies are more important and I would like THX Ultra2 certification. Are pre/power combis any better at driving 4ohm speakers than an av integrated amp?