That is precisely what i was looking for. Great input and comparisons towards what i need to do. The 40B is what i'm looking to scape mainly (the 10 is just something I have to keep the betta happy with).
In an ideal world I easily find a rock like that, but alas i have to keep a look out for - but what you suggested is something I had in mind - I also wouldn't mind a bit of emersed growth as well coming from this tank.
Going to keep an eye out for more scaping materials.
Once again thanks for the great input. Constructive criticism is what helps speed up improvements.