I've used them for a couple years now. None are perfect. I've used the ICS 400. Am presently shooting ICS 500 for 3D and hunting. at 7.3gr per inch it sounds like that's what you're looking at. They are a decent shaft. Maybe won't be quite as durable as what you're shooting now but should suffice. Just make sure if you get them that when they are cut to length that you get an equal amount cut from both ends. In any of the carbons if they are crooked from the factory it's usually at the ends. Give a half dozen a try. You'll probably like them.
What weight broadhead you shooting? I find that a lot of carbons like lighter heads. If you're shooting 100 then try 75. Shooting vanes? Go to feathers. Between all these you could drop about 75 to 80gr off your arrow. Total would give you about 15 to 20fps gain.