Red Flowers

I have had a hard time getting good photos of Red flowers. The color just doesn't seem to photograph well.  I came upon this link and I think that it has really helped.
Basically I need to under expose the photos (because when red is over exposed even a touch it gets blown out and looks bad).  Then in photoshop I lighten the photo and am able to do that without over exposing the red.
The first tulip here is overexposed just a touch, then the second is under exposed, than the last one is exposed properly (after some re-touching).

The red here is still a little over exposed and looses some detail toward the bottom of the flowers.