Which is the best desktop PC for photo editing?

Paul is looking for a desktop PC to edit his photos in Adobe Lightroom. What sort of specification would be best?I saw your response to a question about a laptop for a photography student and noted the suggestion that a desktop would be a better option in terms of actual capability, not to mention the ergonomic advantages you’ve mentioned in previous articles. What specification would you recommend for someone with a mid-range DSLR using Adobe Lightroom for RAW files, but only as a hobby?A