I would go with as much length as you are comfortable with. I started with 8'6" rod for steelies/salmon and I have moved up since. I mostly use a 9'6" and I am going to get a 10'6" strictly for float fishing. So for length, I would say go at least 9'6", you will be happier with the amount of line control you have either drift or float fishing. If hardware fishing, the extra length will help with casting. As for power rating, I would get something in the medium to medium heavy range with a fast taper, 10-20lb line. This would make a great all aroung rod for big steelies/kings.