Whitney Farms is my very favorite and has been for years. They have at least one blend that uses sawdust instead of peat moss.
I tried Gardner & Bloome this year and was quite disappointed in comparison to Whitney.
Portland Nursery stocks a good variety of the Whitney line.

The Canadian peat industry - the primary source of commercial sphagnum peat used for agricultural purposes in this country - is highly regulated and very closely managed. Bogs involved in the harvest of peat constitute only about .02% of mapped Canadian peat reserves - a pretty minute amount. And harvested bogs do undergo restoration. Through seeding, fertilizing and active management, these are returned to a farmable condition in as little as 7-15 years. So peat moss is not quite the non-renewable resource many of us have been lead to believe.

Commercial potting soils are generally soil-less mixes with peat as a primary component. Coir is also used and is becoming quite popular for this purpose. I would personally rate sawdust as a primary component pretty far down on the list as it is subject to additional decomposition (which both the peat and coir are not) and so will continue to break down, compact and potentially impede drainage that is so important to a container potting mix.

Whitney Farms is a great product line, but I switched to Gardner&Bloome a number of years ago and have never looked back :-) It is very fast draining yet has great moisture retention and a relatively high nutrient content. And because of its organic matter components, has sufficiently high populations of microorganisms necessary to utilize the organic fertilizers I prefer. To my knowledge, WF does not offer their potting soil in a bio-innoculated LifeLink formulation, although they do with various planting (not potting) mixes. It really boils down to a matter of personal choice. I just have a hard time supporting Scotts-MiracleGro, which now owns the Whitney Farms product line.

And yes, quality commercial potting soils are not cheap, although you can save a great deal if you mix your own, if that is convenient for you. Although I container garden extensively and use a lot of potting soil, like many of us, I don't have the time or facilities to mix my own and prefer to purchase the bagged goods - I just stock up when I find it on sale :-)

I mix my own from scratch, but for bagged products I like many of the Pro-mix mixes. You can get it cheaper at Stueber's greenhouse supply in Snohomish.
Also the Indoor Sun Shop house brand is a quality mix with pumice instead of perlite, so it doesn't rise to the top like perlite does.

Are you willing to pay a higher price? Black Gold is excellent and Whitney Farms is great so far.

I prefer Black Gold but if it is for container annuals or hanging baskets that get a lot of fertilizer anyway and are temporary I will use the el cheapo Earthgro brand at Home Depot.

I have never tried Whitney Farms nor the brand Gardengal recommends.