How to choose between these 3 sofas? Or another?

[inevitably]

I want a modern 3-seater plum-coloured sofa for our kitchen and so far I've found 3 which I like the look off but none of them are available to view locally in a showroom. The price differences are significant, and obviously I don't want to spend more than necessary, but I do want something that will be comfortable, stylish and that will stand up to everyday use. I don't know whether the price differences I'm seeing reflect a big difference in quality, or just branding. Can you help me figure this out, or suggest any alternatives?

These are the three I've found:

DFS Drayco in Mulberry swatch for £379: www.dfs.co.uk/drayco/dyc13arvv#hzPFC6wSrIGjvWC4.97

Made.com Ritchie in Plum swatch for £599: www.made.com/ritchie-3-seater-sofa-plum-purple

Swoon Nilsson in Elderberry swatch for £1099: www.swooneditions.com/nilsson-retro-style-three-seater-sofa#!24955

Swoon is expensive as is Loaf. Made do some reasonable priced sofas I particularly like the Rufus sofa. Not sure about the quality though.

I would go for the one with the highest back as supporting your shoulders and head makes for the most comfortable sofa - I'm not sure how comfortable that kind of design is. Foam filled seat cushions, not fibre fill as they keep their shape better and are more supportive and comfortable. Good depth of seat front to back as again, better support and comfort. Do you see a theme?! DFS don't seem to last from what I've heard.