It's a good case, and if it ain't broke don't fix it, unless you want a change for aesthetics or the GPU flat out wont fit.
Yes, that and the Phantek cases held many a build in this forum. But, the Fractal had the edge on build quality, cooling and outputs.
@Gray2233 makes valid point. If you don't have a need for the new outputs at the top of the case (convenience) then this option would save you a lot of bother with regard to your desk/amputation (after a very thorough clean out).
That said, it's your build and as you have the funds you should buy what makes you feel good. You upgrade rarely so £140 over 6 years is not a lot when considering your overall budget and concessions.
I always buy a case with the intention of using it twice - and did back in the day (but quality cases didn't change much back then. Silverstone anyone?). Now, invariably, i end up upgrading to the nth degree and when i do full upgrade i pass on my case/internals to friends/family and enjoy the experience of building in a new quality, and usually more spacious and better designed case. But, I like black boxes with sound proofing so they're usually be-quiet's uninspiring designs - but still enjoyable for me.
For example, my daughter's computer is front and center in her, highly stylised room (teenager) - sat on a wooden plinth under her desk. I was going to pass on one of my be-quiet black boxes - she didn't object but i could tell she wasn't impressed. I hinted she could look for another case and she jumped at it. I gave her a £100 budget but, kids being kids, she found the Design North. Had it not been a Fractal i would have told her to keep on looking - but after reading reviews and looking at images I could tell it would compliment her room and arguably become a feature.
TL;DR - if the case becomes more than black box and makes your room feel more comfortable then £140 is a small price for a ~6+ year piece of furniture - which could be used again with a future build as it's a timeless design; for a box. From your original post you seem to have the surplus funds, so you should definitely buy some elements that make you feel good, even if hard to justify logically. We lose sight of that some times when advising - but it's for the best of intentions; more bang for your buck. But, if funds are available, no harm in buying that which makes you happy - life's too short etc...