Hi Biggles
When I first started diving a few years back, I was undecided and thus bought the Uwatec Digital gauge (wrist mounted). Well after my first 2 week dive vacation in the BVI, I was fed up of using my tables & always calculating the pressure groups. Thus I went somewhat overboard & bought the Uwatec Aladin Air X with the SPG transponder. I used it for about 400 dives/5yrs. Never had any problem or needed service. I must say that I really appreciate the air-integration feature, because in addition to NDLs, the computer also calculates the possible dive duration based on air consumption.
During a 3 week vacation in the Red Sea, I was getting an increase in transmission error between the SPG transponder and the computer. Back home I sent the 2 units in for service. I was somewhat stunned when informed by Uwatec Switzerland, that they could no longer service the computer or replace the batteries! (This although the Aladin Air X was still available for purchase in the US at the time) The cost of having the batteries on both units replaced should have been around 100 Euros. Uwatec did offer to upgrade the computer for 200 Euros. So now I have Aladin Air Z O2 and a new battery on the transponder.
The only feature I do not like about the non Smart (These new models have an IR-interface) Uwatec computer is that you have to buy the Memo Mouse, or build a DIY cable in order to download the dive profiles to a PC.
So my suggestion are, get a computer that meets your requirements / budget. Decide / test if you prefer wrist or console style computer, and if air-integration is needed. At any rate make sure the computer can handle Nitrox. Otherwise you might have to buy a new computer if you decide to go on Nitrox dive when you become a more experienced diver.
;-> gjw