why change the emitter????
I think it looks great with the design personal!
If you must change it, lol...try emitter 12 or 10....12 would go with the cuts your made to the outer metal overlay on the emitter part since from what i can see, it only goes to a point on one end, could be wrong but thats all i can see lol.
10 would go too since its an open ended open spaced style like the one you have on their now but with the open ended style, it gives it that pointy look to go with the overlay around the emitter.
GL on your choice! again, the saber is super sweet as is!