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Considering your budget, you could add a pair of stands and a small 10" powered sub and have a great sounding system that is perfect for your smaller room. It's something I could certainly enjoy for a long time without being tempted by the upgrade bug.
Happy hunting!
+1

Get a sub with a built-in filter and high-pass your mains. Removing LF duty makes them perform like a much better speaker -- cleaner, more open and relaxed, less distortion.
I do exactly this with a Gallo CL-10 sub and my JM Reynaud Twins Mk3 (or Omega Super 7XRS mk2) in my secondary system in a similarly sized room as OP (10' x 11'). As do two of my buddies with stand mounts and small floorstanders. They report the same improvements.
This small rig is different but just as enjoyable as my larger room main system with speakers costing over 6X the price. Since they were being closed out last year, Gallo CL subs (10 and 12 inch versions available) can be found cheap on the used markets. I prefer the Gallo CL to the REL Storm I owned previously.
I
much prefer high-passing the mains to running them full range plus simply adding the sub to the bottom. This approach delivers huge buck bang! For a few hundred $$ you get: (1) greater LF reach and weight, (2) tuneable bass (low-pass and output controls on sub for proper blending), and (3) a
not subtle upgrade to your main speaker's performance in the mid bass to HF range.
(Last February I saw the 12 inch version go for less than $200 on an AG auction!)