The best street happens to be the particular street you find yourself at with a particular swell and a particular wind. In OCM, unfortunately, there are no Secret Spots, unless you consider 49th street and bayside.
mid oc is generally has the most consistent sandbars, but all of the sandbars suck right now in OC. In general, the bars are always shifting around, and you can at times find a good wave anywhere in Ocean City. Other times, there are distinct areas that seem to have better bars, but these shift around.