The finest 17hmr you can get is the Ruger 77/17. Any features you find lacking can be swapped out if you want better trigger, better sear, better barrel, etc.
The key distinguishing features of the Ruger 77/17 are really the magazine. I haven't seen any other 17 hmr that I would characterize as being a good magazine. Ruger factory 9 rounds are the gold standard, and of course you can get some crazy 800 round drum mag for it I'm sure.
My 17hmr has an upgraded sear and a volquartsen custom bull barrel. It was the Talo X-17 model so it has a nice laminate stock with it already. I also had an elongated bolt knob put on mine, custom mounts, and a zeiss scope. The original barrel was a 24" (I think?) matte stainless factory barrel and it was yielding about 1/2" 5 shot groups at 100 yards. Thinking that wasn't good enough I bought the Volquartsen barrel for about $500 and get the same exact groups out of it. It's fun to shoot baby aspirins glued to cocktail straws at 100 yards and its very lethal on small game. It's accounted for hundreds upon hundreds of jackrabbits.