SS Amp Designer by Reputation

You definitely want to stay a way from older Krell amps Like the KMA and KSA series. They used an insufficient number of output devices and were under cooled. Many of them blew their output stages.
I am a Pass fan if you can find a decent unit for the money you plan on spending which is unfortunately not likely. You might find a used Sanders amp for that money and they are a great value if you like the sound which is more like the Boulder amps. If you could save up to $5000 you might find a pair of JC-1s which blow everyone away. McIntosh is always an option if you value reliability over everything. They have a very comfortable if slightly veiled sound quality.    

Try Parasound A21+ not A21  

Mark  Levinson 532h is outstanding,  great midrange ranked as about the best and will drive anything with ease. 
You can find on Agon for just over $3,000 Used and will be worth it. 
Their reputation is outstanding.  

With a budget of < $3K it is tough to make a rep based on my experience. But first I would want to know what kind of speakers you are driving. What is the sensitivity in dB and impedance in ohms. Having said that I don’t think you can go wrong with getting a pair of Schiit Vidar monoblocks and you will have money to spare. An amp that I have been circling around because the personal reviews and specs are amazing is the Benchmark AHB2 which is $2999. Another favorite, but you will have to stretch the budget a little is the Bryston 4B3 which you can get used with proper negotiating for around $3300-$3600. 

You could try a used Anthem P2 it will last a very long time, built like a tank and able to drive any speaker out there, 325wpc @ 8ohms