I have an ARIN and it's totally worth the wait. I had an orca and moved to an arin, it's livelier when you put the power down and it climbs like you wouldn't believe. It's very light, but the ride quality is definitely a little more harsh than the orca (duh, it's aluminum), but I've paired it with some carbon wheels, bars and seatpost and the bike doesn't "get to me" until about 4.5 hours or so, but at that point what bike doesn't? As for the availability issues, they probably didn't foresee the splash that arin was going to make amongst a world of carbon. I love it and it's turned into my everything, everyday bike, plus racer as well. I forgot to mention I'm 5'9 and 150lbs or so and I have no feeling of "flex". I'm sure the bigger the bike gets as does the rider that could possibly change. This thing the coolest bike I've bought and I've had my share.