We like to shop at Shoprite since when they have sales they really have great prices. I know this is blasphemy, but if you clip coupons and go to ShopRite on weeks they either double or triple your coupon value then you really save a lot of money. I hung a receipt from Shoprite that showed my wife spent $140 and after the sales and coupons it went down to $60. We also call the manufacturer and tell them we love their products and they also send high value coupons.
Kosher stuff, like chicken and meats are cheaper in Kosher Stores, except when Costco puts their chicken on sale for $1.29Lb.
The key is only shop for sales and stock up. Also always make a list what you need and NEVER deviate from it.