5800x3d is cheaper than I expected. Same as the 5800x launch price.
After a point increasing cache size has diminishing gains. Also results vary per game.
If you want something neat from AMD get one fast, otherwise wait for reviews. Might not hold it's own vs an OCd 12700k.
Edit: My 12700k with a ND15 can run at 240w, but I only use that much stress testing it. Usually 70w or less gaming 4k60, using 10w right now with light usage. Can drop it into the 30s watts on many AAA games. It is the most stable build I've had for years with all of my bios presets. The only time I shut it down or restart it anymore is either windows updates, or I feel like changing a preset to enable 512, disable E-cores, boost clocks to 54,53,51 for numbers or drop them to 49,48,47 for less volts, etc. Also use crappy kingston value ram 4800c40 at 5333c34. Stability problems on alder are often from undervolting the E-cores too much at overclocks and from trying to keep lower bandwidth DDR4 timings from older chips on the new memory controller layout of Alder.