Powerdome, another thing about your "low normal" test. The reference ranges for these lab tests are overly broad. If you go to a craptastic HMO doctor, you know, the type of doctor that has to see 60 patients a day just to make a living in today's insurance climate, they will look at these broad reference ranges and say "well, you are within range".
But "low normal" is not optimal. Having a total testosterone of 250 might be "in range", but it's hardly optimal. Having a sensitive E2 of 40 might be in range, but it's not optimal either. You get my drift.
In wellness medicine, and here at site's like Excel Male, guy's are trying to fine tune and get to optimal, it's far finer than the broad reference ranges of most lab results.