Since it is an all silver hilt, I would suggest getting an all silver pommel. I agree with Zren that if you do not get sound, then keep the pommel that comes with it. If you do want sound, then be sure to upgrade to an AV switch. Pommel style is going to be up to you but I recommend keeping it all silver. My personal favorite all silver pommel is the Arbiter but you need to pick the style that fits you best.
As for color, I am the blue guy. I am always going to tell you Arctic or Guardian blue is going to look the best. Color again is going to be up to you and your personal preference. We have tons of pics showing colors in all different types of blades.
Since you are Darth, I think you may want it in Blazing Red. Here is a picture of a stunt Liberator V3 in that color.
Nekesus pretty much summed up everything we feel about Star Wars and where to look for more information. Always feel free to jump into a discussion at anytime. The primary purpose of the forum is to provide customer feedback for Ultrasabers to help them sell sabers and they have been generous enough to let us talk about a variety of things here.
