RS, thanks for posting the information about the Sebo D Professional. I already knew this though, as I have visited their website. It's nice to see that Sebo has thought of making a longer cord & hose for their vacuums....I have never cared for the short hoses that Miele uses on their vacuums. As for the waterlift ratings, all I know is this is what was published on the
www.sebo.us website....who knows, maybe the suction is closer to my Airbelt C3.1, which is around 90 to 95 inches Waterlift. In either case, I would live with the slightly lower suction....I would rather have the longer cord, hose, bigger bags & better quality.
George, I would rather take a lesser-known brand that is commercial grade, rather than take a well-known brand that is household grade. If this had been the case of a household brand that was lesser-known, then I would say go for the Electrolux, but that's not the case here. Sebo is primarily in the residential market, but has also built a VERY GOOD reputation in the commercial market, so much so that the Windsor & Sebo uprights are the first ones thought of....as well as Electrolux Commercial uprights & the Sanitaire uprights. I have also heard that many professional housekeepers use the Sebo D4 & Airbelt C3.1 for their professional cleaning jobs. As far as getting supplies goes, Sebo is the same as Miele....you can get your supplies from the dealer you purchased the vacuum from, or you can order supplies directly from Sebo's website with a credit card.
I would suggest that you go have a look at the D4 yourself, & see what you think of it. I think if you give it a fair chance to compare the performance & quality to the Miele S5 & Electrolux models, you will be impressed. As far as I'm concerned, I am impressed enough with Sebo that once my 2 Miele vacuums die, I won't be replacing them with another Miele....I will be going with Sebo instead.
Rob