I originally started dreading in December 2010. I have combed my hair about 5 times since then. In 15 days, my dreads will celebrate their first year of uninterrupted dreading.
What I'm trying to say is that you can comb them out, and then start dreading again if you regret getting rid of them. They are not one of those once-in-a-lifetime-opportunity things, and you can change your mind.
Ofc, I am always for people keeping their dreads, and I advise you to think it through, put down all the pro's and con's, and decide carefully; but it all comes down to this: it is your decision, and even if you do comb them out, and then go back to dreading later on, it is all about you. None of us can ever know exactly how you feel, and you have the right to decide when it is the right time for you to dread and stick with it.
If you don't have bangs, you could comb out a few in the front, sou you would have 'normal' and dreaded hair all at once.