I have to agree with those who say focus on experience over more training. I recently completed my DM, and I'm glad I did it, for my own reasons. But I was also kind of disappointed. I did not feel like I learned anything significant; it was more of a confirmation that I know my stuff. At the end I basically thought, wow I really know the contents of OW really well now! Because it was kind of like doing OW all over again.
DM does not make you a better diver IMO. You should already be knowledgeable, competent, and comfortable in the water before even starting the training. One member of my class freaked out in the pool, bolted to the surface, and to my knowledge has not been in the water again since. That person was not ready for DM training, and the class apparently did not help.
I like to think I'm an excellent scuba diver (don't we all?), but I attribute this much less to the formal training I've had and more to having done hundreds of dives in varying locations and conditions, and having been forced to confront and solve numerous problems along the way. I also credit my various dive buddies and dive pros I've met along the way who shared their knowledge with me, as well as years of reading ScubaBoard, Alert Diver, and other sources on the topic of diving.
I would encourage you to at least complete the Rescue course though. The training is enough of a challenge that it gives you a nice sense of accomplishment and added confidence once you have completed it.