I agree that you should pursue more information to rule in or out NVLD and Asperger's. Many consider NVLD on the autism spectrum.

Poor handwriting, sensory difficulties, social trouble are hallmarks of NVLD. Students with NVLD may be very verbal - but often go on and on, missing the point, stuck on the details. They are often early readers and are strong with factual concrete information, but may have difficulty with inference, the main idea and abstract concepts. Usually their VCI is 10 or more points higher than PRI on the WISC. Often they have relatively low WMI and or PSI. Many have attention difficulties and poor organizational skills. Many struggle with math, but may be very good with math facts and rote aspects of mathematics.

Here are some resources:
http://www.nldontheweb.org/nldadvancedreading/understandingnvld.html
http://www2.scholastic.com/browse/article.jsp?id=3892
http://www.nldline.com/

A full neuropsychological evaluation would help to get a better handle on your child's profile. In addition to the tests that Dee Dee listed, they would most likely test for executive functioning skills, verbal and visual memory, academic testing and visual perceptual skills.

Take care.