Oh, thank you all so much, I'm sooooo flattered!
I have experimented a bit with different styles, and I'm currently working on a brand new version which also includes some techniques from Tear's tutorial. I hope it turns out good, for now it's too early to say! I've just done water for now, and it looks good, it has reflection, too!
Oh, and I'm trying to solve the scaling problem, too. Is it just me or Photoshop has a limited amount of depth with Bevel and Emboss that prevents you to make bigger mountains?