I had a home inspection done in Milltown by Mark IV Home Inspections (732-831-1111), and I'm having another one done today by Mark as well (electrical and heating issues popped up and we back out of the first deal). Hopefully we'll have a better outcome this time around. But, his name is Mark Bloodgood, and he's one of the only inspectors that will give you you inspection report on the spot, immediately following the inspection, which is a huge plus.
Other ones you can try that were recommended highly by our realtor:
BPG Inspection Services:
800-285-3001
Eastern Home Inspections:
800-333-2783
These were all inspectors that service Milltown, but, Metuchen isn't that much further, so, they will likely cover Metuchen as well. Good luck!