Which is the best and easiest to find Stronghold game?

Hi,

I really like sims like the guild, Railroad Tycoon 3 and Tropico.

I'm thinking of playing Stronghold. I'm downloading the demo, but I was wondering which one is the best (in general and for new players) and which is the easisest to find in Australia.

I've heard lots of praise for Stronghold Crusades.

Thanks

Yeah I found it on gog

I wish they'd put Tropico up there, i'm looking for a copy