I'm 8 weeks out from my AVR, (25 mm Edwards Resillia at Cleveland Clinic) aorta graft and CABG x 1. I obsessed over valve choice, and you will too. To simplify, the choice essentially boils down to a biologic that will mimick a realtively healthy native valve (my PCP told me I still have a murmur) that will wear out (10-20 yrs) with a gradual decline in function, no need for a blood thinner (usually), decreased thrombosis risk (when compared to mechanical) vs mechanical that is "one and done" (usually, but not always), lifetime warfarin, audible clicking (some say no big deal, others say an annoyance), increased thrombosis risk compared to the biologic and potential catastrophe in the event of, for example, a serious car accident with open wounds. Rare, yes, but to be considered. I'm 63, so choosing the biologic with a TAVR/TAVI down the road (with luck, 15-20 yrs) was a pretty easy choice. Your "young" age will make the choice more challenging, especially where the trend among surgeons, even at top facilities, is to push biologic, while saying "it's your choice." Best of luck!