Now I've had a look at reviews i've changed my vote from on the fence to no.
5090 is too expensive. It's an average generational performance increase with a massive price hike. At £1800 i'd probably have got one, but nearly £2000 is more than the rest of my system combined, and that's for a 7950X3D and all the kit for a custom loop. I just can't justify it. I'd love to know what sort of system Jenson had in mind when he said we all have $10000 command centres?
5080 is a 70 class card at 80 class pricing. They tried this last gen with the 4080 12GB, but at least they still had a proper 80 class card in the 16GB version. The 50 series doesn't have an 80 class card in my opinion. I doubt we'll even get a mid generation 5080 super. The 5080 is already using the full GB203 die and the 5090 is already a cut down GB202 die. Can't see them cutting it down further just to flll a gap in the product line up, unless they have a large number of defective dies.
Not interested in taking a risk on a used card so my 2 remaining options are both AMD with either a 7900XTX for under £700 or wait and see what the 9070XT can offer.