So far I really like the 671. If money was no object, I would have sprung for the SD 722, but for less than half the cost of the 722, I was able to get the 671, 2 - 4 gig cards and a reporter style case for the 671. It records at 24/96 through the digital input, passes a digital signal through the digital ouput, and the analog inputs are as good as what I've used before with the DAP1. And I can record most shows I see (including the opening act) with 8 AA batteries. Granted the mic inputs aren't great, but I don't see myself using them. If I change my mind, I'll get Doug Oade to modify my unit. Plus this is a sweet machine for doing DAT transfers.... and it's so nice to NOT be dealing with a Windows box for recording!
The only negative I see for my use is the fact that 8 gig compact flash cards are so expensive. To do 24/96 with a 4 gig card, you'll only get a little over 2 hours record time. So until 8 gig cf cards drop in price (which they'll probably do soon), I'll mainly be recording at 24/48 since I can get over 4 hours on the 4 gig cards I have right now at that resolution. And you can get over 6 hours at 16 bit on a 4 gig card... If I could get Marantz to make one change to the unit, I'd suggest including an internal hard drive of 20 gb or greater.... but since the majority of the market for these devices is ENG (elecronic news gathering), that's not something that will be in great demand.
I look forward to giving it another spin at the Allman Brothers in Raleigh this Friday!!!!