A.,
Congrats to you for wanting to do research. The Vaccine Book by Dr. Sears is great. He gives you all the facts and then lets you make a decision.
Personally, I decided to slowly vaccinate my daughter (she's now 2 1/2). The rules of thumb I used were (1) only one shot per visit, (2) allow at least a month between shots for the immune system to recover, and (3) never vaccinate when the child is sick - even with a common cold. Many doctors will say that as long as the child doesn't have a fever, they can be vaccinated. I don't agree with this (based on some research I've done). If you think logically: even with a common cold, your child's immune system is still working to combat that cold. So why overload their already fragile immune systems by adding the vaccine?
I have a nephew who experienced regressive autism following his shots. He is now pretty well recovered due to intesive biomedical therapy (something that the AAP routinely denies as a "cure" - even though there is TONS of clinical evidence to suggest it DOES work for many kids) and TONS of hard work on the part of his parents. However, it has been a costly, emotional road for them - something no parent should ever have to go through (to get a good idea of what they - and many other parents - go through, I recommend Jenny McCarthy's two books about autism). And I find it hard to believe that there are NO links between vaccines and autism/ADHD/allergies/asthma. My nephew was tested for his immunity to measles following his MMR shot and he's now shown to have the measles vaccine colonizing in his digestive system. And with so many symptoms of regressive autism linked to digestive problems... I don't understand how a doctor (and the CDC) can claim that there is ABSOLUTELY NO link... The problem is that it hasn't been studied extensively.
Another good source of information is "Healing the New Childhood Epidemics: Autism, ADHD, Allergies, and Asthma" by Dr. Kenneth Bock. Dr. Bock talks about how toxins (including but not limited to those in vaccines) affect these disorders and offers an alternate schedule as well. This book also helped me realize the importance of a healthy diet to protect our bodies against an ever-more polluted environment.
Even with all of that being said, I honestly do think there is value in vaccines. But the current "one size fits all" schedule offered by the AAP, CDC, et al, just doesn't make common sense. And I really wish they'd remove some of the toxins used to make these vaccines (Dr. Sears' book will enlighten you on that part - there is actually formeldahyde in some of the shots!)
Best of luck!