With the OptiPlex 780 (MT), am I to understand that the only way to have a dual monitor setup is to purchase 2 of the following Graphics/Video Controllers?

• NVIDIA GeForce GT330
• ATI RADEON HD 4550
• ATI RADEON HD 3450
• ATI RADEON HD 3470
• NVIDIA GeForce 9033 GE

In other words, using the onboard VGA port, in addition to an addition video card, will not allow me to have a dual monitor setup.

Additionally according to the Tech Guide (pg. 12) it indicates that a MiniTower (MT) supports full height card.  What's the trick here, since I don't see how my current video card is going to fit with the case back on.  I am making the assumption that I'm going to be using 1 of the 3 (expansion bay)(PCI) slots, labelled Slot1, Slot2, and/or Slot3.