I've just sold my SG bass but used flats on it. For no silk at all at the bridge end, I found GHS Precision Flats to be very good on the SG. My strings of choice were TI Flats which sounded ace on mine, but had the silks on the bridge as you mention. I bought a Webbteca Mod Bar which stops this by increasing the distance from ball-end to bridge. It improved the sound quite a like, and I'd recommend them on SG basses.