Thanks everybody for replying. Sorry for my tardiness in a response; I had to move on the 31st so it's been a super long week.
@ Bean: 30 hours, huh? I know they spec it at 23 hours. I will *NEVER* be in a position where I need it to run that long. Heck, I've only ever had to change batteries once at a show - and that was because it started at an Amphitheatre around 3pm and ran until 11:15. Other than that, I've always managed to run on a single pair.
@Belexes: Hey again. I'm *VERY* pleased with my CA stuff. I've done some excellent captures both in 007 and fully open with mic stand. I had the opportunity to run an A/B comparison with my buddy who runs a Tascam 680 with AKG 480's and, yes, his mics sound better (more separation/clarity) but if his recording was deemed 100%, I'd say my recording was around 80-85% of the same quality. The venue was quite crap so it's not a "fair" comparison but since they were inches apart on the same stand it was nice to be able to try it out. The same guy runs the M10 for tighter spots and he's saying the same thing so I might borrow his M10 for a couple of shows and try before I buy but I'm leaning that way.
@Stantheman1976: Battery life _isn't as_ important to me as build/record quality. That sucks in Dual Record mode simply because I'm not always able to have the pre-amp on hand and occasionally have to run off a battery box. Even with the pre-, I've had some incidents where I've needed to gain the Edirol up from unity by about 7 or 8 levels in order to not completely max out the pre- (or in cases where I've even had to). Not being able to adjust recording levels on line-in on dual mode is a *NASTY* bug IMHO. I know I can always boost my levels in post when running 24-bit (have run 24-bit only since the first R09 recording in May 2008).
@earmonger: I like the option of the remote when I need to be even more 007 than normal.
@bgalizio: The 4-channel option is only the duplicate recording at the "lower" recording level, correct and not assignable to a secondary source as there's only one line-in, correct?
Thanks everyone... I think it's safe to assume my purchase will likely be the M10. As mentioned above, I'm gonna borrow my buddy's M10 first and try it out for a little bit.
My main question/concern is that I've read that the hold function doesn't apply to the level wheel - a feature that I loved in the R09. How problematic/sensitive is this as I often leave my recorder in a bag while I'm taping.