I am new to contact printing. I have consider using Azo but it is very expensive to buy and ship to the UK, maybe I'll try it when when I have more experience?
I have just started using Bergger Art Contact 2, which may not be available in the USA yet? I processed two prints in Dektol, one of which I Seleniun toned (3mins@1:20).
The untoned print is a very beautiful cold blue, which may not be to everyone's taste, but I like it. The toned print is fairly neutral. Both are very sharp and have great depth.
Worth a try when it's available.