Hi Michael,

I come across this situation from time to time also, I think I've metioned it in the past.
Re: pop up, instead of having an 'in your face' pop up always appearing when you mouse over a stack of entities, could you have a small symbol appear next to the cursor to indicate that there is more than on entity and then either right or left mouse button, hold and popup will appear, in this way you call for the popup when you want.

Meanwhile, when I do come across this situation we are talking about, I'll drop you a post.

Cheers
~Danny~