An active light source (like the aquarium) that sits behind you and projects light onto the TV will for sure cause reflections, and if those lights are 24/7 I would be concerned. My setup is that there is a bay window behind the couch, then TV across from couch. If I sit so the window is directly behind me (and projecting onto the screen), there is a very noticeable reflection with the blinds open, even if the sun is not shining directly in (just ambient light). On bright scenes it's not a problem, but dark scenes (movies) or TV off it's like a black mirror, so watching movies in that condition is distracting to me. My two solutions:
1) Sit a few feet off centre so the reflection is not inline, eliminates problem
2) Blinds fully drawn - eliminates 90% of the problem
My overhead lights are halogen bulbs that are quite bright, they do not cause an issue unless they light up an object that can reflect onto the screen (e.g. when we were moving in we had framed pictures leaning against the walls/furniture waiting to be hung, those would reflect the roof light onto the screen).
If you are really concerned about reflections, go for the ST.