Welcome to the 'Zone, NeoMiller! Although I don't have any experience with the Taig mills, I have heard good things out about them.
I would think #s 1 and 2 would be no problems. I think #3 may a little slow going, but it should work well if you take light cuts in brass. I'm not sure how well a Taig will handle mild steel.
Edit: Spelling Corrections
My name is Electric Nachos. Sorry to impose, but I am the ocean.
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(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)