OnceUponADream, we have stayed at both PO-R and the Contemporary Garden Wing. Although we really liked PO-R, I have to give the edge to the Contemporary, even though it doesn't have a themed pool.
These are our reasons:
1) Convenience... walking distance to MK, monorail is right there to take you to the TTC, where you can transfer and hop on the Epcot line... also we found the busses to be super convenient to everywhere else!
2) The rooms are very large, and have 2 queen sized beds, and a daybed in each, as compared with 2 double beds, and perhaps a trundle, which only serves children about 41/2 feet and smaller.
3) Even though you will be in the garden room, there still isn't as much walking as in most of the moderates (PO-FQ is the exception).
4) There is a fantastically huge game room on the ground level which adjoins with the counter service restaurant. We really enjoyed the counter service, as well as the coffee bar, found on the ground level under the esculators.
5) There are 3 full service restaurants within the Contemporary.
6) The bathrooms are huge, and have the best layout we have found on property.
7) Onsite childcare in the evenings, on the ground floor, near the counter service and game room.
8) Great view of the MK fireworks from the deck.. you will have to ask exactly where it is, as they have changed it.
9) Great view of the Electrical Light Pageant... we could actually see it from our beds. We had a Bay Lake view in the south wing.
10) Huge selection of shops.
11) Two large pools, the one near the snack shop has a new slide! The other pool is shaped like a bullseye and is surrounded by Bay Lake, which is pretty cool! There are also 2 hottubs.
12) Water taxis to the other MK resorts, as well as the WL, Fort Wilderness, and the MK.
I guess you can tell what our choice would be, if we weren't limited by budget!
If budget does come into play, don't worry, you will like PO-R--- it really is VERY beautiful. The pool will be newly refurbished, plus you will have 4 quiet pools, and the Serpent slide pool at PO-FQ.P PO-R is highly themed, has a decent restaurant and food court, and there is the boat to Downtown Disney in the evening. The bus service wasn't too bad, either... but there are 4 stops as you go around the loop, and often the bus will stop at PO-FQ before it gets to the PO-R stops, so if you are at the last stop, it could be standing room only, if there is room at all. We never ran into that problem, though!
Whatever you decide, have a great time... I know that you will, afterall, you will be in Walt Disnely World!