Many thanks for your kind comments guys! - I am very pleased you have enjoyed the Bryce related tutorials. It wasn't the easiest step to take going back into Bryce after sometime away (in Cinema 4D), but as I said previously, there is still some little bit of magic in there, that really helps in a sci-fi type illustration, and despite many criticisms of it's unconventional interface, it never caused me any issues, and still remains quite easy to navigate, although some modifications are overdue by now I think.
I bought Bryce 6 a week or so back, but beyond doing a rendering speed test (it finally uses both of my G5's dual 2.5Ghz processors properly!), I haven't really had time to do anything with it yet - I hope I can do another Bryce tutorial (what say you Rob?) for an upcoming issue, so I'll be giving it a work out then! ;)
I think for the price (essentially $35 at the moment) it's worth the upgrade simply for the speed enhancements and the HDRI options.
The terrain tools still remain very useful too!
Cheers
Adam