I think you jump brands with tube gear mainly when you clearly seek a significantly different sound. There can be a lot of variability in how tube gear sounds, so changing from something that sounds good already could be risky, especially with the less expensive gear.
I'd stick with ARC. That line is a gold standard in tube gear. A used sp16 like in my rig or the line stage only version has a remote and should come in used for just a bit more.
I'd stick with ARC. That line is a gold standard in tube gear. A used sp16 like in my rig or the line stage only version has a remote and should come in used for just a bit more.