Rather than Vegas, I would

Rather than Vegas, I would say to move up to Liquid Pro. It is around the same price, and Pinnacle offers discounts for upgrading. Liquid is fully professional and is a natural progression. It has internal DVD authoring (with a wizard for us dummies), great audio handling including stereo and 5.1 surround, ADR/Foley, etc., handles mixed formats on the timeline, and is a piece of cake to export/archive and then later restore.