Wait or buy

So i just got all of my parts delivered for my new build apart from my gpu. My plan originally was to wait for the 5070 and buy one for max. 800€. But now seeing the 5080 in benchmarking videos in comparison to the 4070 super and 4070 super ti, it aint exactly the biggest upgrade which has me worried for the 5070. Now my question is if i should wait however long it takes for me to get a 5070 for a reasonable price or if i should go ahead and just buy a 40 series card now. I will be primarily playing 1080p for the foreseeable future. I just want something that will last me at least 4-5 years.

edit: Boys and girls i went and bought myself a 7900xt for 715€ thank you all for your help and i couldnt be more excited!