@BigManCar - I do the same thing. Anytime it comes to tools, I believe in the "Buy once, cry once" school of thought. Cheap tools have their place, but for something like welding I am not a fan.
When you weld something, you are joining two pieces of metal together. Things are generally made of metal because they need to be strong. That means that whatever is holding them together needs to be strong too. I want the highest-quality weld I can get in a situation like that.
Also, the more expensive welding setups tend to have better warranties, and they last a lot longer. You can get really good deals on a used rig that will last longer and do a better job than a new, no-name rig.