PWEs are the hottest thing in cards right now, and I've got the fever like everyone else. Tim recently dropped a PWE in the mail for me with four cards I needed:
It's going to be hard enough to complete the 2012 Panini Triple Play set, so I know I'll probably never have a complete Justin Upton puzzle in my JUp collection.
The A-Rod gets me down to just one X4 on my want list. I had the Zim X2 in my Zim collection, but didn't have it in my 2008 UDX set yet. Now I do. In total, I need 67 more Xponential cards across the four levels. I'm 2/3 of the way to the set.