I have not used the Cobra 2, but have dove for the last two years with the Suunto Stinger. When we bought ours, we looked at the Cobra but decided to go with a wrist style. I have to say, I love my computer and find it extremely easy to use.
As people say and you will read, Suunto seems to have a more conservative bottom time calculation (which is not a problem for me - I would rather be conservative than bent). From what I have experienced diving with others, the difference is not really noticeable until deeper dives and even then it was a difference is 1-2 minutes at depth of 120 ft for us.
The quick disconnect on any console mounted computer is worth it. If you read in the gear section, there are some reports of computers turning themselves on in the cargo holds of planes and it is recommended that you carry the computer on board.