I thought I had it all figured out, and then a helpful chap @ Sevenoaks threw me. Let me explain. I want an inexpensive box that offers DPL II and has pre-outs across all channels as I have collection of off-board power amps (Rotel RB 970s). The speakers are all Kef (Q50s, Model 100, Q85s) and the sub is an old M&K active job. I had decided on a Marantz SR4200 which are in pretty short supply at the moment and gave one of the Sevenoaks shops a ring. Success in that they do have them in stock, however when the chap asked what speakers I would be using them with, he advised that I should consider the 5200 model as a minimum. Is there really that much difference between the two models? I know the 5200 offers 6.1 with a single extra rear channel, but I'm not too bothered about that per se. Should I spend the extra for the 5200, or as a pre-amp/processor is there nothing between this and the 4200?