Sorry you didn't like the AD900's. I have a pair and they are very bass light, but I enjoy the detail and precision so much I can overlook the small amount of bass. Plus what is there is pretty punchy and tight.
My go to headphones for office use is actually a pair of KSC75''s with the Parts Express Mini headphone headband. Yes, they are $20, but the clamping force is so small and they are so light, I wear them every day for 6-8 hours at a time with absolutely no fatigue. Plus they are semi open so I can hear others but it doesn't leak so badly that everyone can hear what I'm listening to. With some quarter modding and the Kramer mod (I've also modded mine to be a single sided entry cable) they sound pretty darn nice too, especially if you'll primarily use them for podcasts.
Plus with all the money you save by getting the KSC75's, you can always buy yourself some really nice mixing headphones!