You’re getting a lot of different recommendations. Personally I like the Sage xi2 and Loomis glx, but you may also want to try some TFO rods. Their TiCr, TiCRX and Axiom all have different actions, and one of them might be a good match for you for less money than the Loomis or Sage. The best advice would be to try out as many different ones as you can- with different lines and line weights to see what works best for you.
As far as distance goes, I think a lot will depend on your casting mechanics and timing, as well as the line you use, both taper and weight. Head length and weight can vary dramatically from one line to another even in the same weight, and performance sometimes is dependent on how much line you can comfortably carry outside the rod tip when false casting. Many folks find that overlining a rod, especially with floaters, turns a “so so” rod into a rocket launcher.
Where abouts are you? Are you on the Cape or MV? There maybe some folks around you that could help a bit with casting, and some groups (like Kenny Abrames from Ken Abrames' Stripermoon
that often has meetups in RhodeIsland)) have informal casting clinics and rod tune-ups where you can test cast different rods with different weights and taper lines.
The thing about distance, at least for me in most NE SW situations, is that it’s not necessary to cast 90-100 feet. And if you can throw 75-70 on the water you’ll probably do very well. But it may be necessary to go 60’ in wind, or even just 20’ into the teeth of a gale, so working on casting is very important, and being able to throw a full line on a lawn in semi perfect conditions—although not the same thing, is a good start.
Perhaps the answers to some questions might lead to some suggestions that could help a bit...
When you throw 70-75 feet is that with a fly like a deceiver?
With or without a doublehaul?
What line are you using now?
When you cast and reach 70-75 feet, how much line do you shoot on that last cast, vs how much line can you carry comfortably in the air outside the rod tip?
Depending on where you are there might be some excellent resources right in the neighborhood. This is a general group for New England salties, that might be worth checking out.
New England Saltwater Fly Rodders
Again there may be many other resources out there depending on where you live, but FFF offers a database listing of certified casting instructors you can search by location. It might be worth exploring if you feel you might need some coaching, a tuneup or just a few pointers.
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