Power Supply Geeek A1 PSU

[sgsharkie]

I'm looking at building my first ever PC (SFF or otherwise) and really like the look of the Geeek A1. My main query is over what PSU to get for it. There are so many variations available, I'd really like some feedback from everyone here as to what model they'd recommend.

I'm based in the UK, so would ideally prefer UK retailers/Amazon.

Thanks in advance!