I really like the Arcam stuff, but a couple of points come to mind: one, the AVR is 75 watts into 7 channels driven (100 into 2); two, the AVR 250 doesn't have preouts, so *if* you decide you want more power for larger JMLab speakers (don't say the thought hasn't crossed your mind) you'll need and amp AND a pre/pro (can you say AV8 and P7?); and lastly, isn't the AVR250 about $700 more than the Marantz? Now, I don't know what the Marantz is rated at (although I think it has preouts), but $700 is a noteworthy chunk of change...I lean towards the Marantz and a separate amp in the future.
Bryan...but the Arcam stuff is SO nice...