Ok, so I went through the whole indecisiveness when I bought my Saber, so I really feel for ya on this one.
So here's some advice that will either help or make things worse
There was a few things I considered when I selected my saber.
Grab bag! - I Highly Considered this one for myself as a first saber to "Let the Force Decide my Saber". But I later figured I would get one with sound so that took this out of my list.
Don't forget the Daily Deal! - This is what I did, and its what helped me decide my saber. When I bought my saber, the Dark Arbiter was on sale. I was not even considering it at the time. I was looking it over and I like the look of it. Love the length of it, and it was EXACTLY what I was looking for in a saber! If I was to change anything on it, I would get a longer blade and add the War Glaive emitter to it. It is a thing of Beauty, and I love it the way it is too! I'll be putting up a review of it this weekend.
But all in all, let the Force guide your decision! It will not fail you.