I think there are a lot of things to think about when making this decision.
1. Is this your first trip or your 10th? If its your 1st, you will probably just want to do all the regular "park" stuff, like rides and shows, so you may not get the value out of the silver plan. If it is your 10th trip and you've "been there, done that" with the rides, you may enjoy kicking back and really getting good use of your wishes with fancy meals, Cirque, Hoop Dee Doo, etc.
2. Are you park commandos or do you hang out at the resort a lot? If you are park commandos, then the room isn't more than a place to sleep and shower, so stay value. If you will hang out a lot then a deluxe might be better. Do your boys like slides at the pool? The values do not have one, but CSR (a moderate) does. They would probably really like that one.
My personal opinion is to stay value and live it up!!!!! I probably wouldn't do the silver plan unless you really planned it well to get the most out of your wishes. If not, you are better off paying cash for everything. I personally am happier when I have more "wiggle room" in my budget for extras. You may REALLY feel like eating a Dole Whip one day (or two or three ...) Or you may really get sick of counter service and just want to eat a sit down once in awhile. Or maybe that picture from Splash Mountain is just TOO GOOD to pass up. It would be too bad if you couldn't do those things because your budget wouldn't allow it because you stayed at the Comtemporary.
From your picture, it looks like your kids are relatively young and would love the theme of the values (All Star Sports???). Or try a moderate. I bet they would love CSR. The theme would be great for boys (although my 2 girls loved it too) - especially the Ranchos section. It is very Cowboy/western. The pool is great too with a great slide.
Maggie