Personally, I like keeping track of my back gas levels with an analog SPG. My wrist computer only tracks nitrogen and oxygen exposure. It's a simple, cost-effective setup that doesn't suffer from problems with syncing a wireless transmitter/receiver. That's just my personal preference, though.
The nice thing about wrist computers is that you can bring them up close to your face to make reading them easier.
I suppose this maneuver might be problematic for someone with presbyopia.
For large numbers, the Oceanic Pro Plus 2 and Sherwood Wisdom are very easy to read. One of my older dive buddies loves his Pro Plus 2 for this reason. Heck!
I can read the thing when I'm
10 feet away from him, depending on the vis. Unfortunately, both of these computers are air-integrated and connected to a hosed console (not wrist-mount).
An instructor friend of mine raves about his Uwatec Galileo Sol. It's pricey ($1500-$2000), but easy to read. I believe it has all of the functions that you'd be interested in. He took advantage of a professional discount on his (Keyman), so the whole price-to-value ratio might not be so attractive to you.
If money is not a limiting factor, there are some expensive computers on the market that are very legible. Some have the hoseless, air-integration capability that you mentioned. I have read about the
Uemis Zurich. It has a nifty solar-power panel on it in addition to a color display. It also has a wireless transmitter option. Retail price is approx. $1600. I have seen the
Liquivision X1 in action. It has a beautiful OLED display on it -- probably the easiest to read screen I've ever seen on a dive computer. The X1 features an open software platform that allows the diver to select his preferred algorithm, but does not work with a wireless gas transmitter. The X1 goes for approx. $1750. Honestly, these computers are so expensive that I wouldn't recommend them to a novice diver.
Perhaps someone can give you a recommendation on one of the hoseless air-integrated wrist computers on the market (Suunto D9, Suunto Vytec, Aeris T3, Aeris Epic, Oceanic VT3, etc.). I have no experience with these units. I've never spent more than $150 on a dive computer.