Hi Gavin
10’ rods by their nature tend to be a slower action, if you want to go faster then look to go a bit shorter to 9’. A good secondhand premium is a good idea if you can find one sensibly priced.
That’s not always the case. I guess budget and style would determine what you could look for.
Another really good option is actually something like a Greys GR60 , which is a lovely 9’ 5wt. There’s quite a few really good 905’s out there and sometimes the cheaper ones are better fishing tools, don’t discount a quality 9’6wt either, most are very versatile and will do the Stillwater scene better than just about anything else, I might even have one that could be for sale
So very much an individual thing. I’m sure there’s a long conversation in this and we will all have a different idea.
Sandy