I wouldn't be nervous about the Nutramigen - if you are on formula anyway. If you don't see a difference, then you can switch back to ordinary formula without any problems.
If it helps with your decision at all, Nutramigen is cow's milk. It is just that they hydrolise it to make the molecules really tiny so that they can be digested better by the body.
Agree with thebunnies re the skin - I was intolerant as a baby and I was covered in eczema.
My DS had no other problems, and is no longer as intolerant. What I mean by that is that he can eat chocolate, butter, cheese, ice cream etc in small quantities, but not a cup of milk IYSWIM.
Also I'm not sure if you read my suggestions on the other thread but I'll repost them here anyway.
Switching from BF to bottles - contraversial I know, but my ds was overfeeding on the breast, which can make reflux worse. With bottles I could monitor the intake.
Nutramigen formula plus Gaviscon - almost instant change
Baby swing - I have a Fisher Price rainforest one that goes back and forth as well as side to side - I found that the side to side motion was much more effective - he would sleep for 3 hours - bliss!
Cranial osteopathy - only went once but it really helped with releasing a lot of wind and poo!
Baby massage and yoga - he used to fall asleep in the class.
Dummy - again, contraversial but worked for us.
Hairdryer/fan/white noise - used to stop the crying and soothe him to sleep.
Wrapping him up warm/swaddling - must have made him feel secure/relaxed.