You know Jay, I usually leave those settings alone, well ok, perhaps 20% boost :).
However, I do play with the equalizer settings both on my
soundcard and the one within i-tunes. Wouldn't mind getting a better equalizer.
Of course, that's probably because my current speakers need a little boost here and there.

I'm with you 256 plus sounds good. I don't have too many 128's but the ones I have sound just fine. Occasional feeling of thinnest perhaps on a couple mp3’s.