I was sceptical about Dell but about a year or so ago I bought a Dell XPS 13 direct from them. I paid extra for the 3 year guarantee including accidental damage (I think £250 or so). The motherboard failed in 3 months. They at first offered an on site repair but then agreed a replacement, which has worked well ever since. There was a gap of a month as these are not stock items, so to rely on only one PC is unwise. However in the end all was well. My desktop is from Novatech; they are local to me so I took that to them at the beginning for a major driver update on the motherboard . Depending on laptop vs desktop, I would consider Dell or Asus and Novatech and Chillblast.
PS the Dell 3 year guarantee was better than Curry’s offer. Do look at John Lewis too as they give 2 years I think