This one officially supports 4ohm speakers. Hence my pick would be Elac B6. Apart from this you can consider Dali zensor 3 and Q Acoustics 3020.
Elac has amazing low end, zensor 3 has better over all sound, low end not as good as b6(not many can produce this much bass) but overall better. 3020 has fantastic mids and highs, low end not as good as the former two, however it's not bad. Try to audition them all and pick your taste.
MaSh
Sent from my Redmi Note 3 using Tapatalk