There are several ways to go with the Sportster rear turn signals.  Our #1 recommendation is to move the turn signals to the license plate bracket.  Harley Davidson makes two kits to do this.  The first one (HD kit #68732-02B) is a bar that attaches to your existing license plate frame, and uses your existing bulb housings.  Although Harley Davidson says that this kit will only work on 04 and newer bikes, it will work on 93-03 models by drilling a 4th hole in the rear fender license plate area (like the 04 and newer models have) for the wires to go through.  The second kit (HD kit #60215-06) is our personal favorite.  It is their layback license plate / turn signal combination and looks really great.  As with the other kit, you must drill the 4th hole in the fender on 1993-2003 bikes.  Both of these kits are pictured below. 

 

 

If your bike is a 1993-2003, and you want to go with the smaller 2700 series saddlebags and don't want to use a detachable pouch on the rear, you also have another option, that is HD kit #68471-94C.  This kit moves the existing turn signal rearward with a chrome relocation pad (photo A below).  This kit works fine and looks good.  If you are also using a HD detachable sissy bar or rack, you can still use this kit but you will also have to get HD docking kit #90465-98A for 2001 and older bikes or #53532-02 for 2002 and 2003 bikes.  This works OK but it doesn't leave your strut very clean looking (photo B below) compared to how it would look with the license plate mounted turn signals (photo C below).