Network time - Still worth considering an Asus RT-AC88u Pro?

So I currently have an Asus RT-AC86U that is working fine, but bogging down under load, and also is EOL.

We've got three people and about 15 devices, give or take. Our internet service is currently 300Mb cable.

The AX88U Pro is currently on a very good sale - $220CDN. I figure my options are that, the BE86U at $370, or the BE88U at $500.

Five hundred bucks is out of my justifiable price range. Spending less (a lot!) on the AX router would be nice, but the longevity (and support lifespan) of the BE86 has some appeal too.

I'm also not married to Asus, although they've been consistently excellent for me.

What do y'all think? Any educated guesses on when Asus is going to EOL the AX lineup?