Re:migrating CW instruments to W7 x64
Rapture is available as x64 DXi and VSTi, but consistently crashes SONAR. They are aware of the issue and hope to fix it. I've gotten the 32-bit version to work in SONAR (x86) version in Windows 7 x64. You can install both the x86 and x64 versions of SONAR on Windows 7 x64.
Dim Pro is available as x64 DXi and VSTi, but the VSTi has issues. The DXi works fine from what I've read and from my own somewhat limited experience with it.
Zeta+ appears to be an x64 VSTi, but not a DXi. I didn't know that it was x64, but I just checked and it and it doesn't load the bitbridge wrapper. I haven't tested it thoroughly, but I've used it a bit and had no issues with it.