You need to answer this first: do you need them to be a closed design (for isolation), and how efficient do they need to be (are you using them with portable gear)?
For efficient closed designs, check out Sony's MDR7506 or MDR-V6 (if they're still around). Slightly bright, but great cans overall.
I've never tried the 280 pros, but I've really liked the open Sennheisers I've heard, so give also those a try if you can.
Beyer DT 250s are great too, but cost almost twice as much as the others listed here.
As for open cans, the usual suspects - Sennheiser, Grado, Beyer, AKG - try a bunch, see what you like.