Lot of great choices......here are few brands I enjoy:
Wilson
Kharma
Sonus Faber
Couple of add on:
Make sure that your amp and the speakers are a great match and play well together. For example, Audio Research and Wilson, McIntosh and Sonus Faber, etc. Do demo your amp brand with your speaker options, it matters. Lastly, save $ for some nice speaker cables. For example, Wilson Audio uses Transparent cables in their speakers. Also, Transparent will bias your cables to match your speaker and amp.
Good Luck and tell us what you decide to do!!