Correct me if I am wrong but Doest Daves cut thier mix with carrot juice?
I had a co-worker raving about how insane it really is but then we were playing with it and it was quite tame compared to some of the rediculous ones.
Siracha is indeed a great one for the list. (Squeezy bottle available at most grocery stores in the "Ethnic" section)
Sambal Ole-ek is another fave. (gold foil labeled plastic almost mayo jar shape with the green rooster on it)
Neither one is really CRAZY hot. I like hot, I dont like to go for records or hurt myself with some of the ones out there.
..now mouth is watering for some spice....