If I wanted to save money I'd have a Harris, great little pole.
I've played with fibre glass and I'm glad I'm not using one all day.
But if you can stretch to it go for full carbon.
I have a set amount I do every time I go out so the quicker its done the better.
I'm around an hour per day quicker with the slx over the Harris.
I reckon that it'd be more over a fibre glass pole