I have an LS-10, and I feel they missed the mark with the internal mics - they definitely need a bass boost in post. If the LS-11 really fixes that, great - but if I run out and buy a new recorder, it's probably going to be something that provides P48 and XLR mic inputs like a PMD-661.
Considering guysonic's report of the bass rolloff on the LS-10 mic-in, my pair of SP-TFB-2 binaurals must be obnoxiously bass-heavy with a flat-response input. With the LS-10, however, they sound just right (provided I take care to avoid the EMI from the display, but that's a different rant). Maybe my ears have just the right shape for the mics.
I haven't managed to test another LS-10 to see if the EMI problem is unique to my recorder or not.
When I first used the SP-TFB-2 mics, I was using the same EQ that I used for the internals. I didn't realize that was a bad idea until I switched my main listening headphones from Grado SR-60 to Beyerdynamic DT 770 Pro/80. Then I realized that the bass boost was a really bad idea, especially with pipe organs.
I went back and remastered the recording without the EQ, and the problem was solved.
I'd love to try the LS-10 with a Littlebox preamp. I've used my E-MU 0404 USB audio interface as an impromptu analog preamp with a set of AKG Perception 170 cardioids and the line input, and the sound is great - but a Littlebox would be better from the portability standpoint. A Littlebox with a 1/4"-20 camera mounting stud would rock - I could just attach the LS-10 to it.