They really are lovely. Bearing in mind your carp fishers might spend 48 hrs in them, they need to be comfy and padded. Mine are made by Cyprinus. If you're going that route, get ones with plenty of legs or you tip them up when you sit down or even stretch for your water bottle in the night. So, ideally 8 legs. Mine have 6, and we still tip them up. Might be worth checking the Chinese sites for them, I'll guarantee that's where many are made.
Again, be prepared to be shocked at prices, having said that I paid just under £100 for an Exped Synmat 9. Just make sure they're what you need cos I'm very comfy on the Synmat. Not as plush as the bedchairs though.