I find the deluxe to be FAR to expensive and FAR too much food to even consider. And we are GOOD eaters!
We did
DDP for our trip. (DH, me, DM, DS12, DD9, DS7). Ran us $180/day. Now we still got appetizers at dinner & tip covered, which you won't have in 08.
Besides the cost, I don't think my family could stomach 3 TS/day, plus you are talking 1-2 hrs. per meal, which takes a big chunk of your day.
We hit parks at rope drop (DSs are early risers) after donuts/breakfast bars in room, CS for lunch around 11 so we don't have to stop too long, snack around 2 to tide us over until dinner and we had ADRs around 5:30 each night. Then we could hit pool and be in bet by 9. (this was essential or DS7 would not have survived w/o his 10 hours of sleep!) The kids were always ready to sit down, eat and socialize about the day by dinner.
I scoured these boards as well as allearsnet.com for menus to select restaurants I thought we would like. It SO paid off...we had TREMENDOUS meals nightly! (no, not everything nor every server was perfect, but overall terrific meals). We did Ohanas, Boma, Le Chefs, Kona, Le Cellier, WPC, PH, and Narcoosees (just DM & I). DS12 is VERY picky, but had NO problems all week being satisfied...we shared everything all week. NO one went hungry! And we actually found it to be a tad much food, but not horribly. Early meal times helped get digestion moving! (we often took dessert back to room for breakfast the next day!

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I think you will find DDP to be a good amount of food. We spent a tad more OOP for snacks, alcohol. We had 5 CS left the last morning, and treated a 2 couples to breakfast! (some will say it is a "no-no", but it was a random act of kindness that left us all feeling good!)
I'd say do DDP, and simply pay OOP for extra snacks/appetizers if you find DSs need more food. I cannot IMAGINE it would cost you $900 extra to fill those boys up! And I think you will find the plan to be sufficient for adults & children.
Sorry so long...just trying to be thorough! (I did NOT book DDP initially; DM convinced me to do it, and I am SOOOO glad she did!)