Simple, Bombproof and Fixed

Careful, none of those are particularly strong frame sets, at least not on the same level as volume cutters and charge plugs anyway.
If I had £800 I'd spend out on strong basic components, cheap out on the unimportant stuff like saddles cranks and pedals, and then upgrade those as and when they break.
Thats pretty much what I did, and I put a lot of stress on my bike, I would go with:
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cutter is the same level as the others. plug would be the most heavy duty, up there with surly