About the Hyponex potting soil... I just made a batch of organic soil. One of the main ingredients is 40# of Hyponex potting soil. The other ingredients are...
40# organic composted cow manure
1 bag of vermiculite
1 bag of perlite
a little bit of peat moss
small bag of worm castings.

Use that recipe and you won't be disappointed. It's not that expensive and it works great for growing pot. That recipe makes a damn lot of soil, man.