Speaker for 11x12 room

1st I would move piano to bedroom. Then I would start with putting speakers along the 12.1 ft wall.  Left speaker spaced 3' from the glass door wall with curtain. The right speaker having about 6ft space between it and left speaker. Position the back of speakers at a distance different than that of the distance from side walls. If possible place a low profile equipment rack along the wall shared with bathroom, not at point of 1st reflection, treat that wall with sound panel at 1st reflection point.  Place listening chair about 6ft from front plane of speakers.Treat the wall behind chair with absorption panel.  Make adjustments from there.

You have received many good recommendation for speakers.  I will only state that I use Fritz carbon 7s in a similar sized room. Sold direct with 60 day trial period. Very tube friendly. 

While I have never tried it, I think @soix has a valid alternative. I know some have had success with this approach. Would not rule it out. My approach was driven by my experiences in several rooms.

Great!  Sonus Faber makes great speakers. Enjoy the journey, spend some time with positioning. Please let know your discoveries.

One thought I had was that even though your room is close to being square, it does open up to the kitchen therefore there will be a lessening of the affects of low frequency standing waves.