I've done some research but I'm still unsure of what I need exactly. Basically right now my rMBP is currently connected to one monitor via HDMI. I'd like to add an additional monitor, however the monitor that I'm adding does not have an HDMI (only vga and DVI). Obviously I'd like to use DVI so which adapter do I need and where do I plug them in? Is the input on my rMBP a thunderbolt input or a display port? thanks for any and all help!