I'm also trying out Silkypix at present, and I am leaning towards replacing C1 with it as my main raw-converting tool. It delivers more pleasing contrast and colour right out of the box with similar noise-reduction/detail characterstics as C1, which to me is a good thing.
I also prefer the more straightforward file-handling to C1's very rigid session folder workflow. I have now set up PhotoMechanic (my preferred image browser) to use Silkypix as my default raw file editor application, meaning that PM and Silkypix now behaves much like the Bridge/ACR combo. I can quickly open any raw file from PM in Silkypix by pressing apple-E. But unlike dwappleby I cannot get Silkypix to transfer the IPTC/XMP-data from my raw files into the processed TIFFs. As PM is supposed to use standard xmp, I would thin this should work just as well with PM as with iView. Are you using the Windows version of Silkypix, dwappleby? Could that be it?
I would also like to warn anybody wanting to test Silkypix that the Mac version DELETES any files with filenames longer than 32 characters right off your harddisk. This is a very serious bug which they are aware of and working on.
I recently found this application which quickly checks the lengt of your filenames for you, and gives you the opportunity to change those which are too long on the fly. It's freeware:http://www.tice.de/m4e/a_software/classic31/index_e.html
I also find the application Renamer4Mac to be indispensable for more specialized renaming tasks. Also freeware:http://www.power4mac.com/renamer/