Im with Chris here, but you miss out one rather important feature with the D4 - can't trust the data of what you're told with pull lift and that's with any brand. The D4 like the rest of SEBO's vacuums have 2100 watts. Not the highest because Miele fight back up 2200 watts. However, the power nozzle floor head sees service with the K3 as well as the Felix and commercial upright version the SEBO Dart and they are designed for commercial use as well as domestic.
Like the rest of SEBO's range, it is all commercial based. I had an S7 and apart from it being bulky, the most annoying aspects were that the rear hose was bolted in by two screws, so if any clogging happened you have to unscrew the bottom hose - with SEBO as you know, it's all about unlocking clasps or unlocking something. The S7 may well have a spring action loader on its floor head but its swivel is too big to go around the corners and the Felix is so much better in this respect if you need a swivel based upright vacuum. I find the X series agitation to be fine and far easier to clean off threads etc unlike the guide-to-cut lines on the brush roll of the Miele.
In addition I can't stand that you have to push you foot on the pedal to get the S7 over thresholds as well as onto different floor coverings. The cushion of air should be enough to interrupt different rugs for example instead of having to use the pedal all the time. The only thing that Miele offers over the SEBO is a far more complicated, heavier hose and wand at the back as well as variable suction control and far more power.
Miele at the moment haven't thought about a compact upright - in their eyes, a compact upright is the Alternative stick vacuum or S190 series, both of which are no longer available to buy in the UK. As a suction only stick vacuum, it is okay but it isn't featherlight. I still have problems with mine due to its bottom fill bag where dust falls out and through the floor head. But I'd rather have it over a Miele S7 again.
