I forget the active EMG model numbers, but IF there's a direct replacement (same size / screw pattern), go with one with a P magnet layout in the neck and a Jazz layout for the bridge: This is an arrangement that Spector used with the Aguilar onboard on their five and six-strings, and it works great.
You'll have no shielding issues or grounding to the bridge, should be a drop-in installation without a bunch of shielding worries. EMGs are deadly silent, nothing worse than a buzzing or humming axe.
Those Schecters are good looking axes for the money, and like a lot of moderately priced instruments they went cheap on the electronics (though you could do worse than Hi-Z EMGs!). Finish this upgrade and you'll have a really nice bass. If you can, use this with a MONSTER or similar cable for the best tone.
Best of Luck,
J o e y