Hi.
If your AOW and Nitrox the Aladin prime will work for you, its a Nitrox computer.
I bought a Aladin prime (the baby brother to the tec) its nice and simple to use great value for money and has been easy to use (once you get the hang of using only two buttons with short or long presses).
The Tec will allow you to do gas switching, do you need that?
I have seen brand new tec's on ebay for around £220 (which is the same price as a prime in the dive shops).
You can compare the differences and check out the operation modes easily by having a look at the
online manual.
My opinion is that you dont need a tec unless you plan to go down the gas switching route or use advanced nitrox mixes above 40%.
Having bought and paid for a prime myself & having used it on around 30 dives, I belive it offers brilliant value for money considering it allows the use of nitrox up to 40% and comes complete with a IRDA interface for transfering dives to PC/ Laptop.
The software is easy to use and simple to understand.
The prime has served me well however after borrowing and using Suunto dive computers from friends I would
not have bought the prime for myself, I would have paid the little extra got a suunto and then paid for the PC Interface.
The main reasons for this are:
The Prime / Tec do not have a mandatory safety stop, they only have deco stops. whilst this is no big issue it annoys me having to get to 6 metres then do a short press of the left button to start the countdown.
The Two button interface with long and short presses bugs me.
Now you just need to decide..