So, here's what my friend and I got in our box:
Lugia Legend top
Lugia Legend bottom
Ho-Oh Legend top
All primes (extra Meganium) = 7 total
All holos except Azumarril, Gyarados (but we did get the reverse holo of it), Hitmontop, and Shuckle
Shiny Gyarados (holo)
2 Jumpluffs (holo and reverse)
4 DCE (3 regular, 1 reverse)
3 Rainbow
We only got 2 Croconaws in the entire box (seems more rare than some primes)
Missing Non-Holo Rare = Pichu
We also bought 2 poster boxes (Lugia and Ho-Oh). Each one had a Prime in it (1 Feraligatr Prime and 1 Meganium Prime)
At the prerelease, we were very unlucky with the holo rares (only getting Noctowl and Wobbuffet) but we still got 1 Prime (Blissey) and 4 Legend pieces (1 Ho-Oh top, 1 Ho-Oh bottom, 2 Lugia bottoms).
We think the HeartGold SoulSilver box had some great results
P.S. we found the Ho-Oh and Donphan packs yielded the better results