First of all-I love my big shot, I use it more than my cricut and I find it was completely worth the money!
If you like making flowers, or think that is something you want to get into I'd say look into the Tim Holtz tattered florals die. It is my absolute hands down go to die for flowers.
But I also love the couple of alpha dies that I have. The initial investment for the alphas can be a bit steep-but if you are looking to really get into making pages it can be nice having alphas on hand to cut titles out with.