Let me start by saying, I recommended a Tassajara to a co-worker.
I think it's a good bike and the fork is comparable to similarly priced bikes. To say it's junk is being a SNOB and I have problems with that. It does it's job and is a good spec for that bike. The fork is no Marzocchi Z1, but the Z1 costs as much as the entire bike.
The Deore components are good components and what I consider the "work horse" level from Shimano. They're not superlightweight, but they are durable as heck. As a beginner you will be more abusive on your bike/gear. As skill improves and you learn to become a smoother rider, you can upgrade componets. Don't worry about this as a newbie. Concentrate on having fun and less with keeping up with the Joneses.
The Tassajara is a good choice as is the K2. Go with the one that "feels" better regardless of component spec.
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger