To the best of my knowledge, the lowest tax rate in Middlesex county is in Cranbury. You should certainly check out the site that my colleague below has linked for you to access. It will help you give a general comparable from town to town.
Also, keep in mind, that many homes are currently getting re-assessed for taxes and are being successfully appealed.
I am not sure what your age category is, but if you are 55 or over, consider purchasing an adult community home. They tend to be cheaper to purchase and offer a whole host of amenities.
Please contact me if I can be of any assistance to you.
Best of Luck!
New Jersey Realty, llc
The tax rates for different municipalities are based upon differient ratios depending upon how up to date the assessments are. So, answers can be a little misleading.
For General Tax Rates by County and Municipality go to: http://www.state.nj.us/treasury/taxation/lpt/taxrate.shtml
I hope this helps.