I think you'll be pleased with the Rio Santo.
I bought a 4pc 6wt this spring to keep in my truck as a backup/unplanned opportunity rod and I'm pleased with it. The rod isn't cosmetically perfect, but it's fully functional.
I've used and lightly abused it on several trips so far (the abused remark refers to such things as lifting a smaller (12-14" trout) fish with the rod just to see if it would take the punishment) and so far it's undamaged. I've overlined it 2 line weights on a couple trips in high wind so I could roll/spey cast and it worked as expected (got the cast out, but the rod was obviously overloaded).
One thing that caught my attention on one of my first trips was a "shiny line" in the wrap at the butt of the second (the grip section being the first) rod section. I thought at first it was a crack in the rod or epoxy, but it was the tag ends of the thread under the clear epoxy.
Closer examination showed the same phenomenon on a few other wraps. Indoor lighting didn't reveal the bright spot, but bright sunlight makes it show up clearly.
Now if I could only get weather to fish the creeks I could test it on some larger fish (hopefully). So far the fishing has been limited to ponds and lakes and the target has been panfish and a few stocked trout.
Flood warnings again this weekend, so the wait continues.