I like my Manhattans served up and my painting mediums traditional, but I was very impressed by these digital watercolor brushes for Photoshop. Super fun and easy to use. The "Wamazing" brushes were particularly awesome, they enabled me to get reallllly close to how I actually paint.
Just picked up the Ultimate Watercolor Set by illustrator Kyle T. Webster. I've been seeing praises for his digital brushes for some time now, no regrets about 8 bucks well spent.