I bought a Tascam DR-680 which I have yet to use (because I've yet to do any video / filming!). I too was looking for a good recording option and looked up tons of reviews.
The DR-680 was pretty awesome except for battery life and crap headphone jack. There's also no built-in mic. Besides that it's great and affordable (~$400 used).
I'd also say consider using a juicedlink if you're running around. I regret selling mine... it's so convenient!
For audio interfaces, the last one I got was the ProFire 610 by M-audio. Decent preamps but for me the key was: Good drivers - low latency!
//edit I meant DR-680 and not the new DR-60D
You mean that you use DR-60d as computer interface?
No, I was suggesting DR-680 for use with camera (dual audio setup) as other people suggested H4N or DR-100 etc. (I said DR-60D initially by mistake)
I was just recommending it as another option in OP's situation. It gets pretty decent reviews and has some pretty good pre-amps compared to anything else in that class and price range.
The preamps in the DR 680 are better than the ones in either the Juiced Link or the ProFire. I'm also not a big fan of M-Audio drivers, and I'm not the only one. Also I think it is amazing that you can tell that the HP jack and battery life are bad if you have not yet used it.
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