I would definitely go with the garden view club level. We travel as a family of 5 (with two teens) and I love having the option of hanging out in the lounge early in the morning when everyone else wants to sleep in. I feel like we have more room because there are more places to spread out. We don't really hang in the room much and we don't take as much advantage of the food offerings in the evening, either. But it's been great for us in the past to catch the fireworks from the lounge if it's cold or rainy or we're just too pooped from the day. For me, it's worth it even with a garden view (which have been quite lovely for us) just for the lounge access.
I also really like having the IPO staff right there to help with last minute reservations or problems. They've made a huge difference for us!
You'll have a great time no matter what you choose!
Cindy