I'd for a rectus 21 female on the hose reel and a male on the pole hose with the flow valve fitted to the pole hose.
They are easy to use and if like me you don't use a controller its nice to shut the valve a bit if your doing a dodgy upstairs bay that's going to drip a lot.
Regarding poles a lot use the slx 25 as an everyday pole and it will do all the three story stuff.
I'd save up if I were you and get an slx you'll earn more per hour with it and it puts less strain on you.
I've got an slx 22 and I love it an 18 footer would do most of the time but I like to reach across and do next doors upstairs if I can plus I don't struggle over connies.
I've got an extreme medium mixed with my slx.
I figured, why not get the lightest brush to go with a light pole?
Its so light that I thought it would be rubbish but it just floats over the glass and shifts everything.
The combination of the 2 added a few quid to my hourly rate.
Happy days