This IS a great thread!
I have a Rainbow that I absolutley LOVE. It sucks up EVERYTHING. I would like to get something that I can use for "in between" my reg vac schedule that is lighter AND easy to store. Rainbows are great, but a hassle to get out for a small quick clean-up. I had a small CHEAP upright and it lasted about 4 months..... the rotating brush stopped spinning, and it smells like rubber burning when it tried to rotate.
I am going to check out an ORECK and a DYSON..... they both sound like good choices. Thanks!