According to my LDS Suunto makes the best dive computer. Suunto's are expensive and I heard they have a very conservative program. I am looking at buying a computer and am wondering, for people that use a computer, what do you like. I am not Nitrox certified yet but will prob go for that next summer. I am also doing an Ice specality this winter.
There is no such thing as "the best" ... in truth, every LDS out there will try to convince you that whatever brands they carry are the best on the market. It's a sales pitch.
Every piece of dive gear you can purchase ... whatever it is ... comes with trade-offs. It'll have some features you like, and some you don't like or need. Suunto makes a nice computer. So does Uwatec, Oceanic, Aeris, and a host of others. Which one is best for you depends on what's important to you. Conservative computers like Suunto and Uwatec will tend to limit your bottom time. For some people, that translates into additional safety and more peace of mind. Other computers like Oceanic and Aeris will be less conservative ... which will allow you more bottom time. Some divers will consider them safe enough and prefer the fact that they get to stay down longer.
Keep in mind that the algorithm a computer uses knows nothing at all about you. It's based simply on a mathematical model and a set of assumptions about what are acceptable decompression limits. Different computer manufacturers add their own safety margins ... more for liability reasons than anything else.
To my concern, all dive computers are safe. What gets people bent isn't the algorithm on their computer, it's usually caused by ascending too quickly ... especially after safety stops when people tend to think the dive's over and ascend at rates far greater than the 30 fpm that's recommended.
As a rule of thumb, any dive equipment salesman who tells me something is "the best" loses credibility points with me. With dive equipment, that's a meaningless phrase. What you want to know is whether or not this computer is easy to read underwater, whether it has a backlight, whether or not it accommodates nitrox, does it have a user-repaceable battery, and what kind of warranty/customer service to expect from the manufacturer.
Other than that, it's a matter of features. One that I particularly look for is an average depth function (makes gas planning easier). Not all computers will give you that ... nor will everyone find it as useful as I do.
... Bob (Grateful Diver)