After much research & consideration I've firmly decided that paying more for more is better than paying less for less when it comes to cordless vac' cleaners - for my purposes anyway, BUT with vfm still at the fore. (Thanks for all comments btw. A friend also gave me access to his 'Which?' account which also helped.)
I've decided on one of two Roidmi models: whether to wait for Black Friday ? - not sure having found a really good deal already.
My floors, dark corners and car can't wait: the house & car spider populations might not be so happy.
[Down-side: Roidmi's dirt collectors are piddling at 0.4 ltr - like a Dyson V6 - BUT that has not put me off because other specs are quite awesome. Hopefully I will be encouraged to wield the Roidmi frequently enough to make the small dirt capacity not too much of an issue !
]
Edit: Stocks of Roidmi F8s (original F8 or F8 Storm) seem quite scarce across the EU right now so I'm not waiting for Black Friday & have placed order today with a UK supplier at the cheapest price (£213) I can find
anywhere across the web!