Notwithstanidng your unfortunate username, I can empathize, as we are a family of five, as well, and our kids are almost the exact same age as yours (give or take a year).
When they were younger, we stayed at the Poly. It was great in many ways -- monorail gave best/easiest access to MK, the park where we spent the most time; also could walk to TTC, which gave very easy monorail access to EPCOT or buses to parks and other resorts; fun theme; nice zero-entry pool with fun slide; youngest (3 yrs old at the time) fit in the daybed comfortably, etc.
A few years later, we tried the (year-old at the time) family suites at All-Star Music. We had never stayed onsite at a "value" resort before, and we were somewhat skeptical. It worked out GREAT, and when you combine with park hopper passes, the cost was about 40% less than Poly. Even though the kids were bigger, the suite set-up felt much bigger than our room at the Poly, even though it probably wasn't much bigger -- if at all. Looking back, I think the biggest reason it worked out so well was that our family didn't need the "plusses" of the Poly as much. They were all swimmers by then, and they had plenty of fun at the pool -- even without a slide. Poolside kid activities were abundant (hoola-hooping and karaoke contests, periodic dance parties with the lifeguards, etc.). Also nightly movies poolside. The food court suited their tastes better than the Poly restaurants. Moreover, our family's park preferences had broadended, so being on the monorail line close to MK was not nearly as important. The buses worked very well for us, for travel to the parks as well as other resorts (for ADRs, etc.).
For a trip this coming spring, we areconsidering a similar stay again in an AllStar Music family suite. We are also had our
AAA rep price two adjoining rooms at AllStar Music, and the price (with park hoppers) for a 6-night stay turned out to be about $300 less than the suite. Moreover, my AAA rep told me that Disney will usually "guarantee" (whatever that really means) the adjoining rooms if you've got more children than adults in your family.
We loved the Poly when we stayed there, and I'm glad we had that experience. We've also stayed at Wilderness Lodge in the past and had a great experience. But given where our family is now in terms of kids' ages, preferences, etc., the value resort set up works best for our family, particularly when you consider the cost savings.