Whatever you buy, someone will have a bigger and better one than you mate! That's the way it is one here which is the only downside of this forum...... I use the Oreck Orbiter and the Sebo Duo and recently cleaned a school, I did it section by section and it took ages.... But, I was getting paid by the hour.... (Not telling you how much cos someone'll charge £10 per hour and others £150 per hour :
(Or so they'll claim))
The Sebo Duo is less work than a manual brush, but it does exactly what you want it to do, it aggitates. Perhaps you should consider a road sweeper to keep the materialistic throbbers on their toes