I own the 3090 and have had second thoughts. That is, it’s great and all but I had to tweak it down a little to make it work smoothly and to reduce it’s power consumption.
Truth be told, I had the 3070 before this and for a single monitor I didn’t see any performance gain from the 3070 to the 3090. In fact the 3070 feels like the right model for me (single monitor) because I didn’t have to do the tweaking to get power consumption and smooth gameplay on the 3070.