Kirby bags
I admit, the cost and availability of the Kirby bags is one of the reasons I "tag-team" it with my Electrolux G with the jury-rigged Eureka powerhead. Bags for the Electrolux are cheaper and more readily available. Additionally, the much lower profile of the Eureka powerhead lets me get into spaces the Kirby can't go. For the kitchen floor, I either use the floor brush of the Electrolux while I have it out for the carpets, or, if if not vacuuming carpet, use my Bissel electric broom, which has a HUGE paper bag in it, though suction is sorta mediocre. Hoover Porta Power gets car duty and general dusting, since it's much easier to carry around. Royal Dirt Devil hand machine gets spot carpet cleaning duty. And lastly, 1984 Dust Buster (still going, has had one battery replacement) gets "accident" duty.