I need help with which diet i should choose!? help?

Which diet do you think would be better for my weightloss. I just need to lose the last 10 pounds. Im currently on the atkins diet but i dont feel all that good, i do feel like i might have lost a few pounds but not much. I just dont feel healthy. So i was wondering if i should Resume doing the atkins diet or go on a low calorie diet, about 800-1200 with 30 minutes of exercise 4-5 days a week. And that doesnt include the activity i get from walking around a mall shopping.