Best amp for 6 ohms speakers

What speakers do you have exactly?

For me when I had a pair of the Andrew Jones Pioneer bookshelf speakers that had a 6 Ohm nominal impedance I liked using them with my Jolida 502P tube amp or a Michael Bettinger reconditioned Sumo Nine solid state amplifier. When I had the Pioneers connected to the Jolida I used the 4 Ohm speaker taps on the amp just to be safe. The tube complement in the Jolida at the time was Tung Sol KT-120s; Tung Sol 12AT7s and Ruby 7025s.

These amps may not be the overall best but they were good to me.

If you can provide more details about your system, speakers musical tastes etc members here can be more helpful.

+1 to Rodman99999's suggestion on Hafler amplifiers. I've had speakers similar in spec to the Episode 700 Monitor speakers and I really liked either the Hafler DH-220 or the Hafler XL-280 amplifiers with them. I once tried a Hafler DH-500 with bookshelf speakers and I got an improvement in bass but the mids and highs seemed to have disappeared.