Great news. Other than spontaneous crashing and processor-hogging, I've really liked Civil3D (2006 - though we have 2008 and it will be installed on my new machine when the bureaucracy gets around to ordering it) and having liked Hydraflow Hydrographs, I can see this a happy marriage for me.
The dynamic updating. I really like that if I change a profile, my grading adjusts and so do my volume calculations. The fact that it has a memory leak and is really picky about the order in which you install the service packs is not as important to me as the philosophy behind the software. The 2006 version was quite new; a second issue, I think. I'm hoping that 2008 will be much more stable; I'd heard that 2007 is. Also, it ran really well on our dual core Athlon 64 at home, but the office machine was a circa 2006 CAD station and I was running a 300+ acre DTM.
Actually a dual core processor can run all the CAD processes on one processor and all the other processes - e.g. Windows, email, spreadsheet, etc. on the other processor so a dual core does give you an advantage.
