OC Allograft or PKR help PLZ!!!

Hi guys I have a long history of right knee probs with 5 scopes mainly for meniscal tears and one lateral release. My recent prob is I fell on a wet floor and received an OC impaction fracture of the MFC. I had MFX surgery 6 months ago, and was in more pain than prior to the surgery right after. After 4 months of severe pain my OS ordered another MRI it confirmed that the MFX had failed and that the defect had actually increased in size. He referred me to a sports med specialist at the university hospital. My appt with her was 3 days ago. She says my defect is too large for OATS autograft and too deep with associated bone fracture for ACI. Her recommendation is Allograft. That being said, she also said I am boarderline in that I may need a PKR due to the fact that I also have OA in the patella femoral region. She is consulting with her partner who does joint replacement to get his opinion. I have done alot of research and I am leaning toward allograft. The thought of PKR just seems so finite, ya know. Does anyone have any experiance with anything like Im going through. I would love to hear your stories, opinions, and thoughts. Thank you.
Peace
Michele