Hi guys, I'm in the market for a mtb under R7k. I have narrowed it down to the Silverback Nabraska and the Schwinn Moab disc. I can't make up my mind between the 2. Can anyone offer me some advice and/or alternatives that I might have overlooked. Main diff between the 2 bikes is that the Schwinn comes with Sram components and the Silverback with Shimano components. Any thoughts on this....