Well, IMHO the D3/D700 are better cameras than the DSMC for at least the next 12 months or so... seeing as you can't take photos with the DSMC until you get one!
If I were you I'd dump the D300 or buy a D700. Or just buy the D3. It's a damn nice camera. I'm preparing to sell my D300 to get a D700, even with my plans to eventually move to DSMC if it meets my needs.
omg YOU ARE KILLIN ME!!!! Can I have an address to send the bill please?