Although I've never heard the DT231pro, I would rate the CALs being almost as detailed as a Sennheiser HD558. Bassier of course and a little less forward on the mids, but other wise... I think the CALs are like Denon 1001s.
If it needs to be compared to something from Beyerdynamic, I would say the CALs are like the DT770 Pro except with better refinement in the bass, a slight bit wider soundstage and quite a bit warmer.
Sorry I didn't see your edited post.
The HD681 Evo is a refinement of the older 681, 681b and 681f all rolled into one package.
Previously, I liked the 681b (which means balance, not bass) the most but felt that it was a little too cold, too dry. Although going for the 681f opened up the soundstage and gave room for some ample EQing, it still wasn't warm enough for me. I didn't like the original 681 because it was waaaay too bright for me though.
Now with the HD681 Evo, I like how Superlux copied AKG's K550 design quite a bit here. Certainly they build quality isn't as high but the improvements they've done? Made it warmer for my liking and gave it a little more texture in the bass, making it quick but not overpowering. This is almost exactly what I wanted in the original 681b, glad that Superlux improved on this area.
The 681 Evo still doesn't have the prominence in detail whoring as the 668b though, the mids are a little bit lacking. Some bit of EQing will help but considering the fact that the HD681 Evo has became so much warmer, I'm willing to live with the loss in detail. It isn't bad, just that I wish it was a few notches more.
Finally, the biggest change that I hate from the HD681 Evo is the suspension headband... In copying AKG's style, Superlux went with the bumps on the headband itself. They're not as intruding as with most AKG headphones, but damn it... I hate bumps on headbands, iritates me a lot. The original headband on the 681 was good, don't know why they didn't stuck with it and gave it a little bit more padding. ughhh.
Otherwise then, changing the earpads on the HD681 Evo to velour gave the headphones more comfort and a little bit more air in its sound signature. The highs brighten up a tad bit, which is a good thing.
you really know your stuff dont you bro, youll be my point of referance from now on ecspecially on ps3
hahahah thank you for your suggestions and help and time you gave me i think ill be going for the superlux and
i shouldnt be browsing anymore because ill probably find new ones but im already satisfied with these so yeah hahahha, but just out of curiosity how many of these headsets do you have to give you these much personal statement