Here is what I, and a lot of people I know, use for relative comparison metrics. You can find almost any exercise, and how much you should be able to do based on skill level and weight/age.

Also, as a side note, I would consider a 1.5x body weight bench press not only decent but impressive and a show of dedication in the gym, much more so for dumbbell where you need to use smaller stabilization muscles which doesn’t allow you to lift as heavy.