I'm in the market for a new bike. I've been trying to decide which components to go with and even which gearing. I've ridden a 2x10 drive train for the last 2 years and have loved it. The thing I like best is that it is simpler than a triple crank. I definitely like the range of a 3x10, but I hardly use the full range. With SRAM's XX1 group, simplicity is taken up a notch, or maybe down because smaller numbers are simpler. This is the route I'm convinced I should go. Having a much wider ratio cassette but combining it with only one ring and making it very difficult to drop a chain makes me think I'll spend more time riding and less time messing with my bike.
Here's a video that talks more about XX1. If you have more questions you can stop in to The Bike Shoppe and ask, I've been trying to find a way to talk myself out of it for a less expensive kit and so I've researched it and all of it's flaws. Plus you can take a look at it yourself, we have a couple kits there for your viewing pleasure.