Which 3d printer to buy for about £500

[curious aardvark]

well looking at the delta mini and the cherry pi - I'd go for the cherry pi.
Seems like the guy building it has done all the upgrades for you - plus a bigger build area. And it just looks more substantial and 'cleaner' - if that makes sense.

As far as which is best - I readily bow to geoffs superior exprience and knowlege. If he says get a delta, get a delta :-)

I'd like to build one at some future point. But still finding out stuff on my flashforge.