It all depends how you want your personal system to sound to you.
Each of us has their own specific criteria and system.
Took me 25 years to appreciate 4 ohm, 92 dB sensitivity speakers with an all vacuum tube preamp and vacuum tube amp (70 watts output). If you want/like 8 ohm 86 dB sensitivity speakers you will most likely have to go with a high watt output solid state amp (>150 watts). Which is fine! I've had both type of systems but prefer the vacuum tube amps and efficient speakers.... The main problem is it takes so long and so much money to finally figure out what you really like.