Just got one of these from Go, very comfy. Would also say that the ones they do in The Range with aluminium arms are also very sturdy, both DH and I are on the large side
We have 2 Outwell Goya chairs, not the smallest when packed away, but certainly the comfiest I've sat in for a long time.
For a big bloke like me (6'2" and heavier than I'd like!) the problem with most chairs we tested when looking in GO etc was that the front leg struts were right at the front edges of the seat.
With the Goya, the front legs are behind the front edge of the seat, meaning the leg supports don't dig in to the back of your legs, without losing any structural support or leaving it feeling slack at the front of the seat.
We bought ours from Winfields last year for around £30 each after discount (because I worked for the company that did IT support for them).
They're currently available at Springfield Camping for £29.99 here.