The club lounges aren't really a meal replacement plan, but I think having both would be overkill. Unless you really want a hot, hearty breakfast each morning, the deluxe continental is definitely filling. You can get cereal, oatmeal, fruit, yogurt, bagels, etc. If you have a heavier, late lunch, you might even be okay with eating the appetizers from the lounge at dinner time. I wouldn't recommend that every night, but if you're plans have you at the resort during the food service times, it's nice and convenient.
Just my own personal opinion, but I would take the money from the dining plan and splurge on both the sunrise and sunset safari.