I did 3/4 therapies you mention with my son and am familiar with the fourth. This is my two cents.
First, do not do PACE, at least first. PACE has both a cognitive and motor component but is a much better fit for a child whose difficulties are more cognitively based than motor based. My son had both difficulties and we had done a lot of motor based therapy but still we hit a wall with PACE.
Second, we did Interactive Metronome but not until we did some Neuronet first. What happened was I did a pretest with my son with IM, and he was so far off that the therapist thought he would be better off doing some other therapy first. We did NN and then later did IM and then more NN.
NN is a wonderful therapy that is balance based. Nancy Rowe is the developer who happens to live in my area. You have to do it through a certified therapist but I think she has developed it now to be something you can even do long distance. It is the broadest sensory based therapy that I know of.
IM is more exact but not as broad based. It is an excellent therapy for a kid with motor based attention problems. But depending on your son, you may see faster progress, if you do something else first.
Balametrics is also motor based. The advantage of it is that it is done at home without a therapist and thus would be the cheapest. NN incorporates some Balametrics.
If you don't have access to NN, I would do Balametrics and then IM. If you can do NN, I would do it and then IM.
Hope this helps.
Beth
[Modified by: dhfl143 on June 22, 2011 02:22 PM]