Tony, I'm not sure if you've got a good idea of the size of the Taig, so here's a shot with a ruler in the frame.
The milling attachment allows movement of about 2.3" fore and aft, and just barely 2" up and down, so your 2" milling window is doable. It depends on what work needs to be done on the work piece. Sometimes you have to reposition it in the milling vise. Thinking out what steps will take you through the completion of the job is often half the battle with these kind of setups.
Gibs have to be adjusted carefully when you get the edge of the working limits of the slides, (true of most machines that use a gib for adjustment).
A good way to find out what you will need for a machine would be to write to Jeff and Nick and tell them the generalities of what you wish to build. They can suggest what you will need in the way of accessories, and even if the Taig is suitable. It sounds like it is, but tell them your most demanding machining scenario and ask their advise.
Dean
BTW, thanks for the kind remarks!