Congrats on the Portapros! I love my Sportapros and kcs75's. You may want to consider drilling holes in the driver cover (Kramer mods) to control the bass a bit more.
You may also want to check out the AKG K403's. I found a pair for $17 and wasn't expecting much, but they are turning into one of my favorite headphones. Excellent amount of controlled bass, forward and engaging mids, very nice highs. Quite well balanced, and they look pretty good (they are the only headphones I can bring myself to wear out in public). So if you find a good deal on them, you may want to give them a try. For now though, enjoy those Portapros!
WHAT?! An AKG for 17 bucks?! Well, you don't see that everyday.