We use aluminium TV ariel poles they are scarfed (think thats how you spell it) so they fit inside each other, they are about 5 foot long very light and work well
These are pretty much what we've all got. They are relatively light (about 1kg a pole) but after playing at Darth Vader with them for 8 hours they get a little tiring. Arms and back suffer most.
WC Sols you say 5 poles. Are most of your cleans at 25ft? Most house cleans for me are at 15ft which is much more manageable. I did a church inside roof clean recently which was a full day at 20-30ft and I was really glad that I'd brought my team of eight female physiotherapists with me at the end of it

Having said that if you're doing 40 house gutter cleans a week then you can afford CF, and probably gold-plated at that

RWC has posted the link.