Sports and Movies are very similar except for the theming, so I'd say go with the one you prefer except that it's so much fun for the kids to get together at the same resort. We have stayed at Pop and although I love the theming there, after staying at the All-Stars, Pop just feels HUGE to me (no way I'd stay there if I couldn't get a preferred room).
We stay at the All-Stars every year for my daughter's baton competition, which is also at WWoS. We always rent a car because the competition bus service is expensive compared to car rental (it would cost us $120 for the weekend plus we'd have to taxi to and from awards at DHS on Sunday night) and wouldn't give us the freedom to return to the resort when she has long breaks. It takes us about 5 minutes to get from the All-Stars to WWoS -- we honestly didn't find any significant difference staying at Pop because walking from the parking lot at WWoS is the longest part of each trip. Wherever you go, it's still going to be faster than if you stayed off-site.
Btw, we only stay at Music because that's where we stayed the first year and my daughter obviously doesn't like change -- I would stay at Movies but the surf pool at Sports is very very cool. But check and re-check your room rates as specials come out -- you may be able to get it lower than $106.