If you're a bigger rider, upgraded front springs may help a lot.
This thread has a chart for quick reference of what spring rate you should be looking for with various weights. Based on RaceTech's calculators, the front springs are only good for <100lb, while the rear is optimal for ~210lb. If one end is good for your weight, the other end probably isn't.
The EX500 has even softer fork springs, but I consider them the single best mod (out of $2000+ that I've spent) I've done on the bike. If they're too soft, they won't be able to absorb bumps well, and they'll be squishy when you're pushing it hard. Getting springs of the right rate will make it perform better and be more comfortable at the same time.