cary audio sli 80 signature vs willsenton r800i

I would try and find a used one to scratch the itch before selling the Cary.  

Keep the Cary definitely…if you are looking for something different try the First Watt amps if you have efficient speakers…

I’m convinced "Willsenton" comes from a chinese mispronunciation of "Williamson", as in the classic Williamson amplifier circuit (source: I made it up).

I assume you’re curious to try DHT SET? SET has never "done it" for me when I’ve heard it, but then I like to listen to rock at high SPLs. It’s different for sure - good for lower SPLs and simpler "audiophile" music.

Best to keep the Cary while you evaluate the new amp, and sell the loser. Of course, if you’re like me, you’ll end up collecting a lot of gear that way...