Well, in a year the Skyliner will be running from POP which is a draw for me, but I don't know if you're interested in that. We really like POP. We did stay at AS Sports, too, and really liked it. We are not into sports at all, but enjoyed the resort. We chose Sports because free dining was available there and also when there are shared buses between the All Stars, Sports is the first bus stop. Mind you, we only had a shared bus twice in our nine day trip. That's only in the afternoons when not many people are using the buses. Mornings and evenings, each All Star has a dedicated bus stop.
If you are looking for the cheapest hotel, definitely do ASMo. I'm sure you'll enjoy it!