If your limited on funds I'd wait for a sale for sure.
Get Together is probably the must have pack for me it helps this game poorly thought out community lot system a lot by allowing you to create clubs and set activities those Sims in those clubs do and which lot they will do those activities at do some yoga at the park, play some arcade games at the bowling alley it helps make the spaces feel more alive and less robotic to only a few activities done.
Growing Together or High School Years much needed family game play for life stages that have been pretty much ignored in every other pack though if you don't play teens much Growing Together for sure.