Which wax ring to use?

I'm mounting a floor mount, back outlet toilet and I'm conflicted by which type of wax ring to use. The manufacturer's instructions seem to call for a plain wax ring, but I read a post on the forum saying that a plain wax ring could sag over time in a back outlet install. The big box store also sells a #3 reinforced wax ring with a plastic funnel on it. The box says it's for back outlet toilets. I've read here about problems with the ring that has the plastic funnel (perhaps I can cut the funnel off?), so I hesitate to use it.

Should I go with either of these options or is there another type or ring I should be using?

If the box says it will work, then it should be fine.
I use the wax with horn with success.
The wax that is rated for wall outlet normally uses Urethane sponge .

You can also buy foam rubber seals for wall outlets.

wax

The wax ring for wall hung toilets usually has an imbedded urethane ring inside it. And no funnel.

For what it's worth, I installed one of those big box store
rings with the black plastic funnel when I replaced my old
toilet with a Toto almost a year ago . Has worked perfect.
No leaks, etc.

ring

Even a blind squirrel finds a nut once in a while. NOT EVERY wax ring with a funnel causes problems, just enough of them so most professionals do not wish to take the chance.