I prefer the First Response Gold Digital that says "yes" or "no". It can pick up a beta as low as 18 and there's no guessing if there's a second pink line or not. Good luck!!
I remember doing research when I got pregnant with my son and I think I found that the Clear Blue Easy non digital test could detect the smallest amount of HCG. That was 3 years ago though so it may have changed in that time.
