right now I am set to buy an Antminer s19 pro with 100Tb hashing power from the same customer from China.
Antminer S19 Pro generates 110TH/S
All I want to know is per hashrate wise, is this good?
It is more efficient and it would be better to be used to join a mining pool than less efficient electricity consuming old miners.
Do calculation more on your electricity, it is very important. If the electricity you are using is expensive, you should not consider buying it. There will be more profit during bull market as you said you were mining before, it is worth buying.
How I wish electricity is constant where I live, but not. This has been one of the miners I have in mind because it is better than the old miners that consume more electricity.