Man, I've been thinking about that same question... I was thinking that I'd really like a Devilgotchi or one that has so many things to do like a keitai or entama (which would be cheaper and easier) ...
I've never been very impressed with my tamagotchi ocean so if I could find it and give it new batteries maybe I could trade someone for a devilgotchi or a few keitai or entama.... I never knew it would be so valuable.
I can't really buy anything that would prevent me from paying rent or publishing my comics... also I'd feel bad getting one with cell phone features if I could never use them (is it just for codes and are they somewhere?) I'd also like to be able to connect to someone else's tamagotchi, you know? It's much more fun that way.
Gosh, now I'm really confused!
So I guess my perameters are like this:
1)Most functions (like jobs and stuff)
2)Most characters
3)Accessible secret features (even if it's only through code)
4)Connectability
which one should I get? Maybe I'll try to find that ocean and see if anyone wants to trade some 'gotchi....
...BUT WHICH ONES?! ARGGG!!