Nolabelle,
In my humble opinion, Go with Raybo's 3-2-1 mix, and add some lime. Simple and done. The harder part is getting your watering evened out and the proper fertilization. Get that worked out and you will do fine.
I believe this is the latest version - see pages 17 and 18
http://www.tomatofest.com/pdfs/Earth...tion-Guide.pdf
3 -peat moss
2-bark fines
1-perlite
So as not to confuse anyone else who might read this - This recommendation is for self watering, sub irrigated only. Top watered containers that utilize drainage are a different animal and need to be treated as such.