Correct Madshi, me confused!

OK Josh and anyone else who can comment, just a couple of questions related to my proposed new setup. It would be as follows:
Three sources: HD Cable 480i or 720P/HDTV OTA 480i or 720P/Denon 3910 480i or 480P.
Setup: Sources fed to Mosquito, then to VP30, then to NON HDCP display, the Canon Realis SX50, a 4:3 LCOS of native resolution 1400 x 1050 @60hz. Signal from VP 30 would be carried by an HDMI/DVI cable.
All three sourceswould be routed through the Mosquito for noise reduction and the other stuff the Mosquito does. Output from Mosquito would be via a single set of component cables into the VP30.
Here are the questions:
1. Am I likely to be better off using the deinterlacing in the new VP 30 as opposed to that in the cable box and OTA tuner? If so, these would come to the VP30 as 480i.
2. Ditto on the Denon 3910. I have to use either 480i or 480P out on it to get around the HDCP hassle (the Canon SX50 display is non HDCP). For now, I'd rather avoid the Digital Connections HDCP "fix". Am I better off to let the Denon deinterlace instead of the DVDO?
3. Will the DVDO be able to "see" which signal it is getting over the single input component cable set and apply the proper processing without switching? In ALL cases I need the DVDO output over the HDMI/DVI link to the projector.
Thanks.
Dan