you need another option: am satisfied with my rig, no plans to increase or decrease mining operations.
in another thread someone mentioned the relation between price and difficulty at difficulty divided by 25,000. at current difficulty, that puts the price at $22.69, which is pretty close to the point the mt gox price seems to be swinging around. of course, the denominator, 25000, will go down as more FRNs show up in the market.
in any case, i can see no reason to panic.