I personally am running a Mcintosh right now but have used a Kinergetics and started out with a hefty B&K and to be honest, couldn’t tell that much difference in the sound but I didn’t really do anything serious listening comparisons.
Some of the other brands I considered were Parasound, Vincent, Luxman, Pass Labs and Bryston so I think the bottom line is how much you are willing to spend and or if you go somewhere for a audition, if you can actually hear the difference.
Most people on this site have a preference and talk about "synergy" between the amp and speakers or a particular amp having a cold or warm sound but I’m not so sure my ears can distinguish anything like that especially now at my age.
Sorry to be so vague but I personally think you’d be happy with any decent brand and btw, in normal listening, my meters show I’m using about 5 watts or less.