Continued Monitoring or Biopsy?

My PSA has fluctuated all year:
January: 8.1 and 7.8
March: 5.4
June: 4.4
September: 7.1
Dec: 6
%Free PSA between 15% and 16.6%
First MRI: Pirads 3 with a 95ml prostate.
Second MRI: Pirads 2 with 70 ml prostate. No focal lesions
Some characteristics of BPH/Prostatitis. On Tamsulosin
62 years old. Father had radical prostatectomy in 1992 at my age but lived another 25 years cancer free.
When I look at all the numbers like density, velocity and MRI reports I' m inclined to continue with regular PSA tests every 3 or 6 months and MRI's. My urologist thinks I would benefit from a biopsy but offered a standard office transrectal 12 core, essentially blind since there is nothing to target right now. Anything else I should consider that I'm not? Thanks