“What dentures are the best?”

This all depends. How much do you want to spend? Can you afford implants for an implant-retained denture? Are these full dentures or partial dentures? (Do you have any remaining teeth to support a denture?) How much bone is available to hold and support the denture? What is the condition of your gums? Are they firm or flabby? What this boils down to is - talk to your dentist.

Dentures that are implant-supported/implant retained are superior to conventional dentures. If the arches are able to receive and contain the implants. If you are medically sound and able to undergo the implant surgery. If no medical contraindications. And definitely, if you are not a smoker.

Everything depends on your mouth-teeth situation.