First I need to say that this is my opinion and not based on any consumer reporting.
#1- Sikkens Cetol Log and Siding. This is the best for exterior wood siding like Cedar. It is very expensive, but worth every penny.
#2- Sikkens Cetol SRD Semi-Transparent Stain. Another very good product. Although it isn't as good as the Log and Siding, it isn't as expensive either.
#3- Cabot's Semi-Solid Siding and Fence Stain. A very good product. It has more pigments that the Sikkens products, test for color acceptance before purchasing. Cabot's also has a semi-transparent that would be #4 on this list.