If you like the ARC sound, I'd go up the ladder with ARC. I've only heard one of the previous Primaluna integrateds at a dealer. It had an intoxicating syrupy sound at first, but after a while, I didn't like how much the sound was colored. I prefer the neutrality of the ARC house sound. One of the nice things about the Primaluna is you can roll all kinds of tubes in it. I believe the one I heard was using EL34s. I don't know if the newer EVO units have the same house sound.
I also own a LS26 as well as a Modwright LS100. The LS100 is in my main system and shares many of the traits of the LS26, but with maybe just a hint more of a "tubey" sound.
I also own a LS26 as well as a Modwright LS100. The LS100 is in my main system and shares many of the traits of the LS26, but with maybe just a hint more of a "tubey" sound.