A wise man told me that you should always get the quick disconnect if it is available. The nice thing with SF is that they don't charge extra for it.
I also recommend getting an extra LED when you order your saber, because if you are like me you can't decide between two colors and you are going to flip a coin anyway. And since you are not having to pay extra for the quick disconnect feature, you will have a little extra to get the spare LED. (It rewards SF for offering the feature without charging extra and offers it at a very fair exchange. Nobody else offers a better LED for the price. Besides an extra module is less than a second hilt in the same model just to get a different color.
Use the money to get a different hilt

or for the multiple thin necks that don't have quick disconnect...
you need 4 Redeemers to cover the range from royal blue to Artic blue... okay I am being partially facetious)
By the time you order your 7th saber you will have a full set of colors. (Unless we can get SF to give us some additional greens... then we will need more than 7 hilts, but it looks like the hilts are coming soon enough to keep all of us satisfied) And there is bound to one or two colors you don't want more than one of, so you start repeating colors.
It also helps address the issue of picures never showing the colors in their true light - which sounds strange - you have the full set you will know which you like and what they really look like.