Of course, an alternate method to "handle" asteroid systems is to research Stellar Manip. 5(?) and create huge planets with 200-300% resource values. Monoliths work really well on planets like that.

I'm using this in a game where I'm blocked into 5 systems and 2 of them are full of asteroids. My points took a major jump after that small investment.
__________________
The Unpronounceable Krsqk
"Well, sir, at the moment my left processor doesn't know what my right is doing." -
Freefall