I definitely think the need at QB is bigger than the need at DB where we stand right now. And compound that with the idea that we can legitimately fill the DB needs elsewhere in the draft. All we've done at QB to-date is lose a player. It was a screaming problem last season, and the hopes of improving for next year after the first round don't exist in my book.
And we don't have to have Romo down for a season for it to matter. Even a game or two could be the difference between playoffs and no playoffs. I can't say the same thing at any other position other than DE right now. At least at DE we've got bench guys who can play the position and a young starter who's a quality pick back for 12 games in his second season.
I'll agree that QB is a bigger need than DB. We didn't fill that backup spot in free agency (other than keeping Kellen Moore on the roster), which should tell us that we at least plan to draft a developmental player there.
Dallas can say it likes to use free agency to fill its needs so it isn't forced to take a player at a certain position in the draft, but DE and QB are two positions that are glaring as needs.
You can look at the secondary and at least say we've got two starting corners (Scandrick, Carr), and third corner (Claiborne) and starting safeties (Jones, Church).