My sailmaker thinks the kite will breath better in light air without the jib, so it's a good idea to have some way to get it out of the way. A furler obviously accomplishes this very nicely.
Check the rules about the forestay attachment point distance aft of the stem. If you're ok there, then you can move the mast back a bit to regain some jib area.
Roller furling jibs can have vertical battens, and RBS makes some battens that can be furled- they're profiled like a tape measure, and snap straight but can roll pretty tightly.
What's the smallest continuous line, above deck furler? Seems that would be the better compromise of function and aesthetics...
Edit: see the RWO unit at the bottom of this link:
http://www.apsltd.com/c-1070-smallboatf ... stems.aspx