What motor cross bike/pit bike should i get?

I used to ride a KX85. I think i want something a little smaller like a 125 or a 110cc. I have a large ride (3acres) so ill be riding on that. I do want speed but i dont want a big 250cc or something like that.
I’m looking mainly for a Pit Bike with nice speed, or maybe even a 150cc.

coming off a kx85? any bike besides a 250 or a 125 two stroke will be a joke for you. it will get boring really fast. maybe go for an xr250? yea, it’s a 250, but nowhere near the power of a 250f or even a 125. easy to ride and fun.