Go with the DME. It'll be closer to your original recipe. It won't be exactly the same, though; it'll be more like you made up for the low efficiency by adding additional 2-row to hit your gravity.
Amber DME might actually work better for matching the recipe. Briess claims theirs is a proprietary blend of base malt, Munich malt, and crystal 60L.
If I were you, I'd probably stick with light DME. If I had amber lying around, I might try it, but I wouldn't go out of my way to get it. I wouldn't bother worrying about the color impact.