Low built ins would give a more open feel.

I agree with low built in but I like the ones you said you could get for a steal.

I don't think it would look right because your fireplace only sticks out about 3" from the wall. the built-ins will jut out further than the fireplace, which personally I think will look odd. (unless you're recessing them into the wall?)

I agree with ILoveMod I don't see how built ins will work in your situation. Also your windows look modern why are you adding crown molding which is traditional? Is the bottom of the slant ceiling just above the TV - the brown? Then there is not room for crown

Is the slant only on that wall, and about how far out does it come? Thought was maybe you could hide it with the cabinetry...make the room look taller as well.

The slant is on all four walls. The slant does start where the lighter color meets the darker color but we are doing stardew on all of it. we thought crown would break it up a bit and add some height. 1st picture more of the room. 2nd picture has the wide crown at slant

No crown molding….To make the ceiling look higher (which you do want) paint the walls, the the slant, ceiling the same white.

Add chests, lamps, art, mirrors…but no built-ins.