Originally Posted by SanFranFlyFish
Just got my first 9wt saltwater fly rod, a Loomis Crosscurrent GLX.
I think you made a great choice! Until the NRX appeared the CC GLX with the Tropical OBS WF-10F was the best permit setup for me. I also own both versions of the OB, but for me and my casting style I much prefer the shorter head OBS. But that's me and as you can judge from earlier responders, one size does not fit all. The only way for you to judge what will work best for you is to demo as many lines as you can until you find it and answer as well the question of overlining. SA lines tend to match the AFTMA standard and SA is up front when their lines are intentionally 1/2 to 3/4 overweighted. Rio lines are generally 1 to 2 sizes overweight and you really need a grain weight scale to know what's what.
As for bones/reds and small tarpon, IMO your new GLX CC 9 WT is too big a gun, but if it's your only gun then go for it. But the same rod (or the NRX) in 8 WT with a Rio Redfish WF-9F is a really great match for inshore flats.
Lastly, the Rio cold water and tropical OBs used to have different cores, but it would not surprise me they are now the same. Rio seems to be heading more and more into cross marketing the same line with two different names; for example, the new Bonefish Shooter is identical to the old Redfish, the new 2013 Redfish is identical to the Tarpon taper, and the new Tarpon Short is identical to the Tropical OB. But even if true, I don't see that an issue. I own both types and have fished both in warm and cold environments and can't really say there's significant casting difference. Good luck with your search.