Ooh I love the colour and your inspiration kitchen! The plan looks good too. I wonder if the base unit at the end of the tall run is in keeping and if it's better to have more consistent doors for the tall units? That said, it's hard for me to say as I'm sure you have a reason for it all and have thought it through. Have you thought about using OnePlan on Houzz for some advice?
I'm thinking that if you really want to imitate DeVOL then Norton would probably be the closest match (I've been to the showroom and had a good look at both). Helmsley is lovely too though. Alternatively you could buy IKEA carcasses and get Shaker Doors to make in-frame doors which look like a very close match to DeVOL (although it's a lot more effort than DIY Kitchens!). I can't remember if I mentioned it before but we didn't go for in-frame as I think it makes the cupboards a bit less accessible. Will dig out a Shaker Doors photo for their in-frame kitchen though ...
I'd probably go with the units all one colour but that's just personal preference! I could see myself preferring one colour more over time.
Re floor tiles I'd be tempted to go for grey as black and white would definitely show dirt/dust more. Not sure about your budget, but I absolutely love these (and have them in my bathroom). Go for the large format (907 X 907mm) and have less grout to clean! www.mandarinstone.com/product/new-york-brooklyn-porcelain/
I've opted for a polished concrete floor but it's £140 per square metre. Definitely worth it for us though as we'd have to pay a couple of grand anyway for a concrete screed base that we'd lay the tiles over. The tiles would probably cost another couple of grand given the floorspace (and my expensive taste!) and then the labour to lay them ... I want a floor that's super minimal upkeep with no grout and the ability to quickly run the steam cleaner over it.
Re pull out bins, I'll have some under my sink for recycling but haven't worked out the main bin. Maybe use my Brabantia and hide it in the utility room when guests come over. I'd be interested to what other solution people are thinking about?
Sadly, I don't have much to report myself. We've been fitting the insulation and had the room plastered so I guess it's progress of sorts. The floor is being polished in just over a week and then we enter a world of flat pack hell of constructing the IKEA carcasses. It should really motor after that and I'll be sure to update. Pretty much everything has been ordered and I can't wait for the trickle of deliveries through April and May.