Hey, thats cool, dive what you like. I was tired of seeing the word "upgrade". It is incorrect. The Air Z is a fine computer and is totally useable for many years to come I'm sure. Hell, some peaple still dive old "bricks" safely with no complications. I liked the hoseless and will probally get a hoseless smart when they are availible, and give my console to my wife. (she is diving a suunto mosquito now and using a sp mini guage). As far as decompression dive planning, I dont know which is better, probally niether, these are recreational computers, not tec diving, tri gas, gas switching, blah blah blah. Although, I do know a few peaple who use the Air Z with a rebreather, but I'm not trained in the use of that equiptment, so I couldn't comment on the advantages and disadvantages. The cool thing about the smart is the micro bubble feature. DAN has shown level stops are the way to go to prevent deco sickness. I am just trying to stay out of the chamber and prevent any long term damage from repetitive diving and the smart has a good level stop program. (I guess, when it works, I shouldn't have bought the beta 1.0 version!!!) Happy and safe diving to all!