Don't whatever you do buy an Xtreme!
I made that mistake.
Trouble is they are so darned good that you'll never settle for anything less. My main pole is my 25'Xtreme with extension. With the extension it will reach most velux's and all three storey work. It is so light that very often the extension stays on for a couple of weeks without a problem. Xtreme brushes too - it can't be beaten. Of course this kind of quality doesn't come cheap and neither do the spares.
I've also just done my end of year reports and I'm 5K up on last year, don't seem to have gained that much more work and so I'm either working far quicker or the drought has some bearing on it. I'm certainly not working any harder, no more bursting biceps, strained stomach muscles or neck ache. Brilliant pole. I also have the longer one for my higher work.