any dual monitor card will do.
you can search this forum for video cards (radeon, geforce, etc) that are working well for people currently....then check that vendor's website
there will probably be a dual monitor version of most of the video cards people here are using.
as for one vga and one rca...most radeon cards do it, but I think it may be mirrored. They may only do the extended desktop with dual vga.
you can also try ati's website. they make the radeon cards.