Well, I sort of surprised myself with this one... The 2nd body is indeed going to be a crop body-- a D300s. That will complement my new D700 quite nicely while I save up for a D3s. 
Yeah, I decided to make the switch. A financially non-destructive way to do an even switch was available and I took advantage of it. The clincher was actually holding the D700 and getting to play with it a bit--I was very impressed. As a product line, Nikon's bodies have everything I'm looking for feature-wise, I prefer the ergonomics/build, and best of all, the bodies actually exist now... the uniformity of design in terms of controls is a nice plus as well.
Hopefully I won't be shunned from the forums because I've learned a ton about photograhpy on here--and I still own an S95. 