I have the AB3 in 270win that I picked up when Cabelas had a sale a few months back. It's not as nice as the X-bolt but shoots great, at or under an MOA, and is pretty nice for a budget rifle. The X-Bolts I've handled are way nicer...never shot one tho. My rebate arrived in about 2 weeks if that makes a difference.
My wife bought a Xbolt Micro Midas last year and she loves it. In fact she wanted a synthetic stock, but it was only offered in pink at the time we bought it. I bet the micro composite is really nice. I've been really impressed with the Micro Midas.
They also run a rebate where you can upgrade to a full length stock in the next 5 years for 50% off.