i need a forest on top of a mountain and the one i tried looked terrible. 

which sets have the best looking pine/fur trees in them? i have quite a large area to cover so a variety of colours would be nice. 
any other tips would be appreciated

I think that in your case Pine Trees v1 by Old-Spice can fit perfectly!

You may also use the other Old-Spice's sets such as:

- Tree Expansion
- Vegetation Set

That you can find here:

http://www.putmeonthenet.net/content/old...nery2.html

And the n7's sets:

- BIG Trees

That you can find here:

http://www.customscenerydepot.com/cslist...p?user=379

Hope could help!