The usual pitch in my country tend to be pretty firm; Or does that make no difference and should just wear SG boot anyway?

Asics and Kakaris are pretty good, I wouldn't get soft ground boots as I read about that not going so well on tougher sufaces.

i am topest league player prop . get some asics for u

If you are a forward you should always use SG boots. The forwards boots are equivalent to the gun of a soldier, always 21.