I have used a lot of 845 tubes and the best to date were the Psvane Acme Supremes that I purchased from Grant Fidelity who unfortunately no longer carry them. I have not tried the Elrogs, KR or the Takayuki as all were just a little more than I was willing to spend for four tubes.
845 Tube Refresh
Most of the info I find on new production 845 tube recommendations is a bit stale. Some of the variants recommended are no longer readily available. I just bought an 845 tube amp with basic Shuguangs and I am wanting to try something else without spending the price of the amp all over again. NOS 845s are too expensive for me to consider. What say you 845 fans?