My office is about exactly that size. But its full of racks, gear, computers, Desk, file cabinets yeah. Theres scant little room for walking around. I use two 40 in tall 3 way towers. No sub. Theyre my desktop speakers. Sitting on either side of my corner desk. Theyre like huge head phones but without the heat and pressure headphones can provide.. they used to be in each diagonal corner but things had to change. Ill be moving them back to the BR HT system soon though.
Near field listening is an under statement, in that room. Yours will be much better.
I dont see 10 x 11 as a real problem. IF you keep everything on par with the system. Im assuming the 11ft is the length 10ft the width. Seems just right for small monitors & a sub. Lateral spacing ought to be fine, off the wall distance though looks to be a tad more limited, given the distance off the wall behind yourself the LP will wind up being.
The big deal IMO is going to be reflections primarily. Front & side walls first. Upper corners of the room too. Tons of ways to address it/them. Hanging up Rug runners on the wall behind the speakers, and diffusion at first reflection points on the side walls will be big helps addressing the upper corners will help that slap echo a lot. Dropping a set of 18 x 48 x 2-4 DIY fiberglass panels set diagonally on each corner should be all you need if more is desired place one 24x48x2 panel on the wall behind your head centered on the wall and your ear height.
U might even want to go with narrower panels like 12 in. vs 18.
Inl lieu of some of the corner treatments, you could put plants in there. Hanging, on stands, or in thin wicker baskets just so the waves are broken up. In fact I prefer a room to be a tick more lively than dead, and not look studioish like.
So simply add what u can when U can as you go here or there it should be fun Good luck.