Sync questions
FWIW, I have the KitchenSync and am in love with it. (Really! We're getting
married next May.) Seriously, the kitchensync has two channels and will sync
the two inputs to each other, giving you locked syncs. If your cables are the
same length, you could switch between sources with a push button, if you were
so inclined. As to your other needs, check out the local A/V sales and service
shops. Sometimes they have older pro/industrial gear for cheap. Good luck!