A bit late to the party here, but I would like to share my workplace setup. I too had to deal with limited space but so far this setup gave me much enjoyment.
Cabasse Baltic Evolution driven by Audio Note Cobra with built in DAC. The coaxial nature of these speakers make their near field experience excellent. Beautiful speakers for female vocal and classical, more musical compared to Diablo Utopia imo. Other excellent options I have heard were Yamaha NS3000 and Raidho X1T. The Harbeth you have shortlisted is excellent as well.
