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.
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.
You mean that you use DR-60d as computer interface?
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
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