I'm a Fellow Stoner/Doom/Sludge/Psychedelic player...
For me.....none of the pedals you mentioned would be a contender over these posted below
and For my money these pedals are the best and hard to beat for our type of Music
First and IMHO the Best Bass Fuzz ever created!!
Mountainking Electronics MEGALITH
This thing is Incredible...just wish it wasn't so big!!!
hey and If it's Good enough for Al Cisneros and Wino !!! http://youtu.be/ucjNUBRQ-Hg
Next is the Prescription Electronics Depth Charge
Check this demo out at about 2:30 in!! http://youtu.be/sJHB5J-dheM
The M.A.S.F. Starry Wisdom Bass Fuzz http://youtu.be/o5Nt6QhiWbk
YMMV but I'm not a Big Fan of Synthy Fuzzes