I'm going to track the changes that I'm making to my sumpless 30 gallon in this thread. I've decided to upgrade my lighting to a 250w HQI Sunpod, which should arrive within the next two weeks. With the new lighting, I'll be able to add some SPS!
Since winning TOTM, I've added a pair of Tunze Nanostreams. I love them.
I recently ditched my Emperor HOB filter for a Fluval 405 canister. After realizing that the canister wasn't really accomplishing anything (and that it would probably end up being detrimental to the tank, since I wouldn't clean it often enough), I decided to ditch that too. I'm now Berlin style with only a skimmer. I've hidden my heater and grounding probe in my skimmer. I'll also be placing a small bag of carbon in there that I'll be changing every two weeks.