Without spending too much (I don't care for aesthetics - I look at the screen!) - so I think up to £50 is probably reasonable, looking for myself I was kind of expecting to have to go to around £90, so your recommendations are pleasing
Assuming all those you listed are going to be fine for the primary purpose of not overheating, which is likely to run the quietest? I might as well take that opportunity, all other things being equal.