I'm in the same boat as you, I'm 370 LBS and just picked up a bike, but take this with a grain of salt. The stuff spec'd on the Goblin is a great value. Things to keep in mind though, if you plan on doing any true off road riding plan on upgrading your brakes. My bike came with Hayes brakes 180/160mm rotors, and they didn't do a very good job of stopping me, even on small hills. Shimano SLX/XT seems to be the gold standard in brakes so I ordered SLX brakes and 203/180mm rotors, my bike is at the shop getting them installed as I type this.
The wheels are going to be another weak point. Everyone will tell you to run out and buy Stan's Flow EX with 36h Hope hubs, which is good advice, but wait until you find the weak point of the wheels that come on the bike, you may not need them. My bike came with light duty XC wheels that are working fine for the time being, I'm out there trying to turn every ride into a huck fest though. Once my riding ability exceeds the ability of the wheels to stay straight and true, I'lI replace them. Plus, it gives my marriage time to recover from the bike purchase.
The fork is another Clyde weak point. The fork that comes on the Goblin is an air fork, so you should be fine there. Just know that you will probably have more that the usual 30% sag, and you will likely bottom out some with the fork. Compared to the fork on the Giant, which is also an air fork mind you, it's a little more stout.
If you decide you like the Goblin, see if you can find a Trek Stache to take for a spin, the geometry is pretty similar.
I don't know what your goal is in buying a new bike, but above all else, get out there and have fun riding!
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