Thanks guys.
Thrik - I was looking into blender, sculptris or the XSI mod tool as starting points, just not completely sure which will be the most benificial.
Killer - I've noticed this myself, I wanted to give the stone work a bit more depth...I still need to desaturate things a bit and adjust the layers of paint that provide that contrast. Thanks for taking a look any offering you're feelings!
All the best,
Rush