As I recently started downloading and listening to lots of podcasts, I found that my Hero's 2GB MicroSD card filled up literally overnight.
2GB is such a measly number that disgracing the Hero with it any longer was a blow to both mine and its pride, so I headed over to Amazon to find a new faster, higher capacity storage card.
After careful deliberation and weighing all pros and cons, I ended up picking the A-Data Turbo 16GB Class 6 MicroSD card.
Here are the factors I had considered before I picked the A-Data card:
16GB was enough for my needs and 32GB was getting really expensive.