If you want to run a full implementation of RGBM, the only computer I'm aware of which will do so is the Liquivision Xeo--it's available as an add-on from a third party vendor. Who knows what Suunto's proprietary version of RGBM is? OTOH, why not choose an algorithm more likely to match what your teammates are using, and is available on desktop computers, smart phones, or tablets, i.e., VPM or Buhlmann GF. I agree that at this point you should be reading "Deco for Divers".
I have the LQ Xeo and there are many things I love about it. I love the tap interface. It's like a touch screen IPAD or IPhone.
I can change algorithm easily to match my buddies or because I've decided that I want to run a certain algorithm. I have the RGBM option which I purchased.
It takes minutes or less to change Gradient Factors or anything else before starting a dive. It has a great screen with large, bright figures. It's incredibly easy to learn how to set and switch through the screens. It's potted so that it won't flood. You can recharge batteries and change them in seconds. You can also use cheaper, commercial batteries with only a small loss of better time.
Finally, I love that it also has periodic updates and an alert for the update is sent by email so that I know about it.
There is only one other computer that I would consider and that's the Shearwater Petrel. I think Shearwater's service is known to be somewhat better than LQ's.
I haven't started tech training yet so I'm a newbie when it comes to all that but I can say that you will want a bright, easy to read computer screen, since poor viz and low-light conditions are somewhat common. You also want a computer that YOU control. Locking out because you didn't do what the computer wanted is unacceptable, IMHO.
As you get older, that bright screen becomes even more important. A big reason my husband and I switched is that we needed a brighter screen. My husband switched from an older Suunto with AI but I can't remember which one he had. We do lot of night dives and cold water dives in poor viz and couldn't read the displays of our non-backlit computers with smaller displays. The local lake can have viz down in the zero range at times, especially with students kicking up silt in OW training. On weekends, there are tons of classes going on and the viz in the summer is very poor.
I would strongly recommend that you pick a tech computer with features similar to LQ or Shearwater. Suunto doesn't compare.
AI is fine and I know there are a few cave and tech divers out there using AI, with a backup. You do need to protect the transmitter is overhead diving.
Just make sure you have other features that are useful. Being able to switch algorithms would be something I'd strongly consider.
I am computer and digital watch challenged so ease of use is very important to me.
