Hey guys, I'm looking for a cheap, descent usb 2.0 to vga adapter. I'm not worried about screen resolution too much. I'm running Protools 8 on a 2011 imac with the i5, 2.5ghz processor and if any of you are familiar with Protools recording software, you know that it is a dual screen program. I already have an external monitor connected via thunder bolt/display connection. I have the mac displaying the "edit" window and the external monitor displaying the "mix" window. It would be cool to have an additional 3rd monitor to display the plug-ins that I use and some of the other little windows that are populating the edit and mix windows. I've looked around a bit. I want to make sure it is compatible with my computer. I have seen some that require a power supply but seems a bit much. Any suggestion? Thanks.