For me, it’s an electric toothbrush. It doesn’t matter if you go with Sonicare or Oral-B, once you start using an electric toothbrush, regular toothbrushes don’t ever feel like they clean your teeth properly. The smooth plaque-free top layer of your teeth that you can feel after using an electric toothbrush can’t be replicated with a regular toothbrush.
But you could just go with Phillips? They have been using the same heads for a long time I believe. I buy mine from Costco in bulk.
Im not sure who I started with but initially there was no rechargeables and then like the first rechargeable I got had to be replaced because we could not get heads. I gave up at that point. I just don’t trust them to keep the things going. A few years is not enough for me its gotta last minimum a decade and preferably a few.