I'm thinking of upgrading from a Pioneer with 5.1 and DPL to something 6.1 and DPL II ETX etc.. Looking around I'm considering either a Yamaha DSPAX630 (or the receiver if I can't get the amp) or a new Sony STRDB790. Now I know the Sony is shipping this month and I haven't seen a review but perhaps the 780 would be a reasonable indicator as to likely performance? One other thing: Richer aren't sure if the Yamaha 630 is a 6.1 amp as they don't have it in stock and their website says it isn't - anyone know? They will be mated to an Eltax set for a couple of months before I get some Missions (probably) FWIW. Comments on the two appreciated. I'm inclining to the Sony - mainly on the grounds it's the newer and it's the cheaper oddly enough. (Will listen to it when it's available, obviously) Thanks.