Wow, loads of people calling for open Senns.
Assuming you need closed headphones (since both of the ones in the original post were), the 280s are still much better than the V600, and provide a different, though not necessarily better, sound than the V6s.
These other Senns are nice to varying degrees (though the 590s recommended earlier are pretty bad for the price), but none are sealed. If you need sealed, then the 280s are the best in the sub-$100 US category (the V6s might run in there). Under $125 US are the A500s.