Sydney, i have been playing with PE6 recently for GT and had a couple of real nice fish. PE6 regardless of breaking strain is less resistant to shock load though, so it is always horses for courses, the higher risk makes it so much fun but.
Agree on all counts there Andy. Really enjoy the fun with PE6 but it should be in an appropriate environment. Same goes for choosing between PE 8 and PE10 (you will be pleased I hope to know that I am now a convert to PE10 when fishing you-know-where and you were right all along on that one).
After all, our friends at Carpenter make a large number of PE6-8 rods specifically for GT fishing.
You might want to try PE7. Noticeably lighter than PE8 but it will give you a bit more confidence that PE6. And with 600 metres of Varivas Avani GT Max PE7 on a spool, and the fact that you can get 200 metres on a 10000, makes for very efficient use.