You're post is almost the exact same dilemma that I'm in haha! I'm taking my niece for her 10th birthday in October and am very much debating between CSR, POFQ (where I am booked), and Cabana Bay, however at the moment there isn't even affordable availability at CSR so it's a moot point I guess. We are doing a little more park stuff though so what's better for me won't necessarily be the same as you.
Anyway, my most recent stay last week was 7 days at Cabana Bay, and one night at CSR after we had to extend our trip a day due to weather at home. I really enjoyed Cabana Bay and it was certainly a better price (and you get a lot of bang for your buck), but CSR was absolutely amazing to me. Also, and this is going to vary person to person, I didn't find the beds at Cabana Bay particularly comfortable. My friend thought the same. The beds at CSR were a dream in comparison.
The pool at Cabana Bay is really nice, but the pool at CSR is quite nice too, plus there are the quiet pools at CSR which I enjoyed much more. You may get a lot of benefit from the quiet pools since you are traveling with a baby, as there is a lot more activity and noise at the main pools in both places.
While I'm still on the fence myself about my upcoming trip, I'd say I'm more likely to keep with POFQ, or potentially CSR if anything should open up there. Since I'll be doing more park stuff with my niece (
MNSSHP, Typhoon Lagoon or Blizzard Beach, a day at Universal and maybe a day at Animal Kingdom) I'm going to benefit from the free transit to/from the airport and the parks, versus having to pay more in cabs from Cabana Bay if I keep to my planned park days.
There are just some of my observations and kind of where my head is at for my decision, but you'll enjoy any of these places!