For your information: The following were the top recommendations to buy, in order;
Bissell Healthy Home 6100-F $499
Electrolux Cyclone XL Bagless ZCX6412 $299
Dyson DC19 $649
Hoover Freemotion Pureair TFB2223013 $449
Samsung Twin Chamber System SC6591 $299
Electrolux Ultra Silencer ZUS3386 $450
Nilfisk Power Allergy P40 $449
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Following were the brands tested:
Bissell Healthy Home 6100-F
Dyson DC19
Electrolux Cyclone XL Bagless ZCX6412
Electrolux Green Ultra Silencer ZUSG3000
Electrolux Ultra Silencer ZUS3386
Hoover Freemotion Pureair TFB2223013
Miele Duoflex 4000 S4212
Miele S2120
Miele S5311
Nilfisk Power Allergy P40
Numatic Henry HVR 200-22
Samsung Multi Chamber System SC9180
Samsung Twin Chamber System SC6591
Sebo Airbelt K3 Vulcano
Vax Zero Advance VZ-302
Vax Zero Infinity VZ-704