Huffahouse are you anywhere near the DIY showroom? It's well worth a visit if you are, as you can really get a feel for the quality of the units and see if you like their finish more than IKEA. We previously had an IKEA kitchen and it was fine, showing its age after 10 years but that's fair enough! Main issue for installation is lack of service void at the back of the units, so it can make fitting more complicated in some circumstances. Also I found they offered less range in unit sizes than DIY, I would have struggled to get units to properly fill the space in our utility. I also liked DIYs styles more, but that's a personal thing really. Also worth bearing in mind that IKEA units come flat packed so take longer to install. Our fitters were really impressed with the DIY units, said they'd fitted a 20 grand kitchen recently that was similar quality!
BUT, the thing with DIY is that you need to be very involved in the process (in my experience), you need to know all about end panels, plinth, pelmet and cornice, think ahead to any fitting issues (eg will induction hob fit over a particular drawer unit), work out which way you want your doors to open, where the split will be etc. I quite enjoyed the process as I like to have full control over how the finished product will look, but I know this wouldn't work for everyone! You need to read all the advice guides they have and ask lots of questions. And unfortunately some of my questions were answered wrongly, so I'm currently waiting on them to send a replacement broom unit for the utility as the information they gave me on the shelf height was wrong!
If I did it again? I'd still choose DIY, I absolutely love our new kitchen and it's worth the hassle! Sorry that turned into a bit of an essay, I've been painting the utility all day and too exhausted to do anything more than play on my phone 