If you are looking at value resorts, I would stay at POP. I have stayed at both pop century and all star music, and i have loved POP both times i have stayed there. POP is the newest of the value resorts, and it has its own bussing system. The rooms are a pretty nice size. The first time there i stayed with my mom and my neighbor and her mom (all over the age of 18) and we were pretty comfortable. and that was for a full 7 nights. We had a room in the 90's building which wasnt too far from the busses or food court (if you cut through the parking lot) we were there in july and there were a lot of kids, but the resort has three pools to choose from, and the 90's building was pretty quiet. the hotel is also themed nicely. gives me more of a disney feel as compared to the moderates.
just this past may i stayed in POP again, with my boyfriend. we booked late so we were on a budget. once again we were in the 90's building. no complaints. in may it was a little less crowded than july, and that made it even more awesome.
i have also stayed in port orleans riverside. and we liked it there too. everything was a little more spread out, and walking back to the room at the end of the night was a little rough. very nice resort, though. and i would have no problem staying here again. the plus about the moderate is that there is more activity. some nights there is live entertainment, there are the water activities (paddle boats, sea raycers, etc) the pools are a little more themed, and the grounds are much bigger for strolling.
may 2008 we are staying at french quarter, just because i need a change of pace. we also have a little more time to pay for it, because we didnt book at the last minute.
my suggestion is to stay at POP if you want more money for the parks, because how often are you going to be in the room?
you guys are going to be there a while, so if room end entertainment are important then i would go for moderate.
it's going to be january, so that's a value season...in the US schools are just getting started in the second half of the school year, so you dont have to worry about there being much crowd.
any other questions i will try to help as much as i can.