Hi, here at IQaudIO we recommend the awesome QAcoustic 2010 or 2030's. I'll be checking out some Acoustic Energy speakers later this week too I hope.
Look for 4 to 6ohm and good sensitivity (89+ if you can)
Choice for home use is very much on style - select those you like and see if you can audition them with the Pi-DigiAMP+ at the shop.
Hope that helps,Gordon@iqaudio.com