I don’t think it’s worth repairing the Vandies when you can buy the whole speaker in good used condition for less than the cost of repair. And you'll still have your old speakers around for other replacement parts if needed in the future, or you can just sell them to lessen the net cost of the new used Vandies. That's of course assuming you want to stick with that speaker.
https://www.ebay.com/itm/264436438739?ul_ref=https%253A%252F%252Frover.ebay.com%252Frover%252F1%252F...
Frankly, I think you’re doing this backwards. Finalize what speakers you want that do all the 3D stuff, etc. you’re looking for and then find the amp and preamp (or integrated amp) that can drive them properly and that also have sonic properties you’re looking for. And yes, for heaven’s sake get that AVR preamp section out of your system as it will be a significant bottleneck to the level of sound quality you can potentially achieve. A good integrated may well be the best and most cost-effective way to go since you need both an amp and pre.
Some other speakers you might consider are Joseph Audio and ProAc just to name a couple alternatives. Best of luck.
https://www.ebay.com/itm/264436438739?ul_ref=https%253A%252F%252Frover.ebay.com%252Frover%252F1%252F...
Frankly, I think you’re doing this backwards. Finalize what speakers you want that do all the 3D stuff, etc. you’re looking for and then find the amp and preamp (or integrated amp) that can drive them properly and that also have sonic properties you’re looking for. And yes, for heaven’s sake get that AVR preamp section out of your system as it will be a significant bottleneck to the level of sound quality you can potentially achieve. A good integrated may well be the best and most cost-effective way to go since you need both an amp and pre.
Some other speakers you might consider are Joseph Audio and ProAc just to name a couple alternatives. Best of luck.