Sorry about the lack of updates. I've just spent the whole evening on the Dell™ website, trying to order a new computer. Worst website ever: navigation utterly incomprehensible.
Finally managed to specify the options I want and proceed to the checkout, only to be told that I'm not allowed to give a delivery address other than my home address unless I first register the alternative address with my bank—which is shut. The Dell website helpfully advises me that, if I can't register alternative addresses with my bank, I could temporarily change my home address.
Yeah, like I'm that desperate to give my money to Dell.