How do I set up an ergonomic home office?

Polly wants to dump her laptop for a more ergonomic computer due to neck and shoulder pain

I'm an academic with neck and shoulder problems and fear turning into a hunchback through too much peering at the screen. I'm now moving house and setting up a home office. I want to dispense with my laptop - the source of my problems - and buy a desktop and an ergonomic keyboard.

I'm confused about whether to get an all-in-one or a PC with a separate monitor. I am only really going to use it for internet and typing articles. I realise that this means I can look to the cheaper end of the market, but is there much slowdown in speed at that end? Should I be spending the money to get a good processor? Polly

Laptops can be considered harmful if used for prolonged serious work rather than casual use. If you have neck and shoulder problems, you should seek medical help. I've been saved twice by an excellent physiotherapist, at my own expense. I've also spent time and money mitigating problems, but there is no panacea. Buying an ergonomic keyboard is only one part of a solution that could also include the mouse, desk, chair, lighting, work habits and, perhaps, glasses.