Dazmond.... I've got the Brodex Hydra alloy poles... 7, 18 & 25
They are cracking poles, really robust (I'm heavy handed)
The 25 as said above is too long for downstairs work.
If I was you I would grab a 30ft cf pole for the higher stuff (depends on your work), the 18 hydra alloy (for regular domestic work) and then buy or make up a short pole for those tight spots (like down the sides of connys or over flower beds).
The brodex brushes are good to start, but they wear down quickly. Have had mine about 2 months now and I'm looking to change the brushes