I started diving with a Cressi Leonardo 2 years ago, and bought a Shearwater Teric 1 year ago. I kept the Leonardo and wore it as a backup on solo dives and liveaboards, and otherwise left it in my gear bag in case I forgot to charge (or forgot to bring) my Teric. Several months ago I lent it to a friend, and he just finally returned it with a dead battery. I replaced the battery and got it to beep again, but the screen is blank. I reached out to Cressi but haven't gotten a response and think it's unlikely they'll help. I'm not going to give my friend a hard time about it; I don't think it was his fault and I'm in a much better financial position to absorb the loss.
The question is, what now? I don't have an urgent need for a second computer, but I'll probably want one eventually. If I were to buy a second computer, which one would make the most sense for me? I still dive solo, though not very often (and not very deep) since I've met so many great buddies lately. I will likely do more liveaboards in the future, though not for another year or so. I still have the idea in mind to pursue tech training, though that's probably more than a year away.
Things I liked about the Leonardo/reasons to get another one: cheap, watch style, already familiar with interface, already have the cable to download dives, no need to charge battery, user-replaceable battery.
Things I disliked/reasons to get something different: single-button interface plus need to press (and hold) button to activate backlight made it inconvenient for night diving, overly sensitive ascent alarm, unable to get average depth without downloading dive (and inconvenient to download with cable), different algorithm that was mostly more conservative than my primary computer, damn thing broke after 2 years and company won't respond to emails.
Should I just wait until my need for a backup is more pressing? Should I just buy another (maybe used) Leonardo and throw it back in my bag just in case? Should I buy another Shearwater--maybe a used one, maybe a Perdix so I can still have that throw-it-in-the-dive-bag-and-forget-it-till-you-need-it convenience as long as I throw in some extra batteries? Another option I'm not considering?