Several thoughts,

What does IMO mean? - i've seen it before but am a bit slow.
Who would ya play in the next test assuming McGrath is fit, Tait or Kaspa?
For me i am leaning towards Tait, Kaspa is not in outstanding form and Tait caused a few problems when he got it right.

McGrath
Lee
Tait
Warne

Seems a bit more potent to me albeit a few runs may leak.
How about dropping Katich to take in another Bowler, let Warne fill the role of the all-rounder as i think he has scored more runs than Katich in this series to date. Perhaps then Kaspa to bowl when the ball is a bit older.

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I like Bing Lee.