my prefered method is to model the terrain by myself just like ulillilia.

but if i would go for a terrain generator i would go with ice-x2.
it looks very promising.

im sure, nobody who has read this thread, thaught that its a newbie question.
it is a very interesting topic.
i think many people (like me) just havent tested these editors, so it is difficult to write an answer, that would please u.

cheers

sinnlos