To reinforce what Keithr mentioned, I own 804S and used to drive them with all SS gear and got a McIntosh MC275 (tubes) and loved it, and later got a Lamm LL2 deluxe preamp, and loved it even more. The ergonomics of the Lamm aren't for everyone, though. I don't mind not having a remote and prefer to spend all the budget on the sound vs bells and whistles, but that's just me.
You should audition the 804S and tubes.
My two cents!
You should audition the 804S and tubes.
My two cents!