Well, there's nothing else in the price range of the 424mkIII,
digital or otherwise, that has all the features of the 424mkIII.
The PXR4 &
BR532 are digital, but they just don't have comparable features to the 424mkIII, with it's full mixer, etc.
A 424mkIII can handle all of your basic recording needs, from the novice to the fairly experienced user. You can dump your work to a computer, and there's no real need for an external mixer, unless you're really running out of inputs, like with large ensembles, etc.
In fact, if you wanted more flexibility than the 424mkIII offers, like the guy above was referring to, I'd recommend purchasing a Tascam 234 and M30 mixer, instead. Or maybe better yet, an M30 and a Tascam 34B or 38, which would be a big boost in hifi. BTW, You can get an M30 mixer and a 38 1/2" 8 track for less than the 788.
But back to my original point, IMO there's nothing in the price range of the 424mkIII, currently, that has such a full complement of features, never mind sound quality. The 424mkIII, if used right, can produce a rich, hifi sound.
You know, these days being digital is "it", and being digital is trendy, but IMO comparing the PXR4 & BR532 to the 424mkIII is an apples to oranges comparison.
More, IMO,
A Tascam M30/38 rig makes the 788 look like a tinker toy. Likewise for the 424mkIII. By my comparison, the PXR4 and BR532 are little 4-track tinker toys, as compared to the 424mkIII.
Shop for yourself, assess your own recording needs, etc. Compare for yourself. Try a few hands on demos, and really scrutinize the features of the PXR4, BR532 and 424mkIII, and maybe you'll see what I mean.
Good Luck