Problem in this case with all those makers is cost and time.
The Spyderco K11P has been discontinued in 2019, so if you find one and want that, then don't hang around too long. Some places in the US had them knocked down to under $100. Personally, I would not get the Spyderco. I think that a super kitchen knife should be something that gets used a lot, and I think that something with a bit more finger clearance would be more widely useful in the kitchen.
With that in mind, I might suggest this company:
https://www.japaneseknifecompany.com/knives/western-knives.html
They have a shop on Baker Street, London, which is packed with knives and could be worth a visit if you want to handle things and get advice before buying. The filter on the left side lets you pick what steel you want, but it is a little klunky since it doesn't show the pared down options on the right with all the knife thumbnail pictures...it pares down the list of knife styles/ranges in the "Category" box on the left. One has to pick from that Category list to see what knives match your filter criteria.
I know you say that your husband likes VG10, stainless, and stainless does seem to be more convenient for a kitchen knife, but I would like to suggest the Blue Paper steels, which are available with stainless steel cladding. If left wet, the edges will oxidise, but a knife like this should be looked after, and drying straight after washing isn't that much of a chore! I have an IceBear santoku and my dad has a Murray Carter Santoku both in Blue Paper steel with stainless cladding. Both can be sharpened to split a human hair (hold hair, draw knife across hair 5mm from where held, cuts half way through hair, then splits hair for 3mm).
While VG10 is used in quite a few Japanese made knives (Fallkniven range, lots of Spydercos..etc..etc even in knives that sometimes appear in UK kitchen stores), the Blue Paper steels appear in far fewer. It is a much rarer steel in the UK. The cutting edge is ground a LOT thinner than normal western kitchen knives. The thin, hard edge respond to fine honing on flat stones. They can chip if worked carelessly on rod type sharpeners.
Blue Paper Collection. There is a lot of info about the steel here.
https://www.japaneseknifecompany.co...9,316&material=121,183&price=82-198&style=128
Super Blue Paper collection
https://www.japaneseknifecompany.co...9,316&material=121,183&price=82-198&style=128
The bigger knives are a little higher than your stated max £150 budget, but there are smaller ones within budget that I still think would be more fun for your husband than the Spyderco. Also...laminated blades are just cool.
ATB
Chris