http://www.mesomorphosis.com/article...th-hormone.htm
Here's an article I think you'll find interesting. It compares Gh to testosterone for muscle growth.

quote from article:
"It is just my opinion at the moment that the overall benefit/cost ratio for improving body composition is higher with testosterone than growth hormone. By cost, I mean both the monetary price – testosterone is far cheaper than growth hormone, and the side effect/safety profile – testosterone is safer than high-dose growth hormone use."