Freebird - I'm not going to tell you mechanical versus tissue -- but at 58, the likelihood that you'll need a procedure to replace a failed/failing tissue valve in your lifetime is fairly high -- depending on how much longer you live, and other factors. The likelihood that you'll have to replace a mechanical valve are negligible -- I won't say that mechanical valves aren't sometimes replaced, but the track record for mechanicals is exceptional.
If you're going mechanical to avoid the clicking (which you get used to) or having to manage warfarin - realize that warfarin isn't that big a deal. I've been taking it for 28 years, and many on this forum have been using it much longer. It isn't really a big deal.
If you're gambling that by the time your tissue valve needs to be replaced, a new technology will have been developed that can be done through a catheter - realize that this is still a gamble. Perhaps they'll have an improved TAVI procedure and valves, perhaps they won't.
By that time, maybe they'll have developed an anticoagulant that doesn't require dosage adjustment and weekly testing. Maybe they won't.
Maybe, by the time your tissue valve fails (all of this assumes that you'll be around long enough for it to fail), they'll have a better mechanical that doesn't require anticoagulation.
This is all a bunch of 'perhaps' and 'maybes.' What should be fairly obvious is that, at 58, a tissue valve may not make it without having to be repaired or replaced at some time in your life. Second (or later) surgeries are always more complicated than the first - scar tissue to deal with, adhesions, and other stuff make it more difficult for the surgeons.
I'm sure that you've thought very carefully about this -- but, if you're avoiding mechanical because you want to avoid warfarin, please think again. (One more thing -- there are other reasons that people take warfarin - if you develop one of the other reasons, you may wind up taking it anyway).