I checked Consumer Reports and the "Accu-Check Aviva" was the top rated of the group. The Wal-mart "Reli-on" that I have was also listed as excellent on accuracy (although one reviewer just said the test strips were recently changed and less quality -- hence less accurate -- he said he tested three boxes of strips and found the readings way too high -- but whether to know if he's right?)

A consideration is also the cost of strips -- I don't have insurance (I'm on a medical sharing program but it doesn't pay for any doctor visits or medicines). So I might have to stay with the wal-mart brand and hope for the best -- but I'm still researching.