Smooth sounding integrated

i like the rogue sphinx at 100 watts for under 1K used. NOS tubes smooth it out for sure 

second hand arcam delta 290, 300$ 100wpc

I'd agree with the Marantz.  Lovely amp, good power and clean.   It plays nicely with other devices you may add later in life.

Another vote for Rogue Sphinx. I would say it stands pretty tall in this group of amps. IMO.

Rogue Sphinx was my second choice but I went with Bel canto C5i first because I wanted to give the latest and greatest modern digital amp technology a shot before relying on more tubes (and less flexibility with digital sources) and have never looked back.

That was in my second system. In my main system, bigger Rogue Pharoah is one I would strongly consider there still these days when the time comes.

When looking at integrated amps it is a good idea to know what kinds of inputs you will want or need when deciding. There are many very good sounding choices otherwise.