Thanks everyone for the input and links.
Sounds like I won't be retiring the Helios. If the action of the ONE is the least bit different, maybe a bit stiffer/zippier, I can use it as a streamer rod.
I looked at the Winston and Scott when they were offered, but both of those were considered 'medium/midflex actions' so I felt that was too close to the Helios. I never casted either a Scott or a Winston, I know different manufacturers have different actions, although they try and use the same terminology to describe actions.
I also picked up a CF Burkheimer Vintage DAL trout 9' 5wt. It's their full flex rod. I wanted something in the same length as my Helios but a slower action. I like to change things up now and again.
I think that'll do it for 9' 5wts.