I have a HD200 that I haven't used for several years. It is indeed a monitor type, and it is also very bright, just as you said. Great for studios, not great for natural-sounding, extended listening.
Are you looking for a specific type of upgrade? If you want to stay w/ monitors, try the Sony V6 (not V600, stay away from that), as it should go much lower in the bass. There have been some good reports on the HD-25 lately, though I haven't heard it. If you want to try something different and don't need isolation, Koss KSC-35 would be my pick. Bit on the warm and bassy side, but fun and doesn't wear your ears out. Or the AT A900, they're also quite good and probably more balanced tonally.