End-game, TOTL? No. But it is a truly great value.
I think the 4.A may sometimes lack a little bit of subtlety up top. It's by no means offensive, but it can stand to be more refined. My
comparison with the TO GO! 334 may give you some more insight into what I mean (
index of comparisons). I'd also like the vocals to be taller and more rounded with the 4.A. Interestingly, though, the 4.A does come surprisingly close to the performance of the TO GO! 334. It also made me waver on buying the F111; the 4.A was just more enjoyable to my ears, if less precise.
As you might be able to surmise, I don't like gobs of bass. To me, the 4.A gives me a nearly perfect bass presentation, with its one flaw being that it begins to roll off around 30 Hz (though it's still quite present at 24 Hz or so). I haven't heard the 8.A, but from how people describe it, it's bass galore. Perhaps everything else is still able to shine through, and I imagine that the 8.A is something like that of the LCD-2/3 in terms of giving off a very solid low end while preserving the mids and highs, but I prefer the simplicity of a flatter response. When I was considering the different options, the 8.A wasn't even on the table. I briefly considered the 6.A and the NT-6.