How much time did you give the 5Ts to break in? It frequently takes 100+ hours for a speaker to begin to open up and show you what it can do, and frequently a new speaker sounds congested, lean, dull, etc. until the internal components burn in and open up. Frankly I'm surprised they didn't offer a significant improvement over the Orbs, which again leads me back to maybe they're not burned in yet. You might call Aperion and ask them about this as well.
That aside, if you're getting an SVS sub at some point in the future you could demo their floorstanding speakers that have gotten good reviews. Assuming the Orbs do a good disappearing act and image nicely and given the size of your room I'd look at the Joseph Audio RM25XL or perhaps something like the Thiel 2.7 or Gallo 3.5. If those don't make exponential improvements over the Orbs -- well -- maybe you're just an Orb guy. Tough to make firm recommendations without knowing specifically what you're looking to improve (other than size) and what aspects of sound are most important to you. Hope this helps and best of luck.
That aside, if you're getting an SVS sub at some point in the future you could demo their floorstanding speakers that have gotten good reviews. Assuming the Orbs do a good disappearing act and image nicely and given the size of your room I'd look at the Joseph Audio RM25XL or perhaps something like the Thiel 2.7 or Gallo 3.5. If those don't make exponential improvements over the Orbs -- well -- maybe you're just an Orb guy. Tough to make firm recommendations without knowing specifically what you're looking to improve (other than size) and what aspects of sound are most important to you. Hope this helps and best of luck.