I've never used the ionics but I'm sure some one who come on here rated them.
Above 65ft and you really only want to be using the gardiner extreme with extensions.
Go on the web site under poles there is a date sheet for pole specs (height,weight,price)
This will give you the best idea of what you need .
Just looked at the ionics price list and the swift plus-80 is £3125

I rate the Ionic Swift+.
I politely disagree though CGH.
I believe that at 80' the Gardiner extreme is nowhere near as good as the Swift+.
Yes it's lighter, but it is nowhere near as stable.
I use the extreme purely because it'll fit in my van.
The Ionic used to have to go on the roof, and I always felt vulnerable.
To 65' the Extreme is best but that extra 15' to 80' makes it very unstable. IMO.
Money: yes the Ionic is £3k but the extreme is £1,200 + 6HS extensions @£250 each (prices from memory) is £2,700. Not a great deal in it...
I wonder how many have used both poles at 80' so can compare properly?
What I've posted is only my opinion.