I'd think the universals are a bit of a gamble, considering adel is a very new tech from 1964. V6S are solid, and at $560 are a steal, value galore! If you're looking for an iem upgrade, the customs would surely do the trick (assuming you don't already have better iems ).
Then again...you could just do both!
Ah, I didn't know that. That does make them more tempting...personally I feel that with a budget this high for iems, it almost doesn't make sense to get anything but customs (at least as far as fit and sq are concerned). Then again, resale value would be much higher for universals.
There we go!! All working as expected and ordered.
Now to get impressions into the mail.