Hey all, I'm back. New forum, new postings.
Tigers haven't been bred in captivity yet (there have been a few claims but no proof), and several of the other ambystomids have been bred in captivity (marbleds being one of them). I would recommend a tiger though...very friendly, hardy, and colourful. Sadly, if you buy one it will be wild caught. You can get them fairly young, even as larva, which most places call incorrectly "waterdogs".
This way you can raise it from a baby in captivity...which may help ease your heart.
The other ambystomids are not bred commonly in captivity (I know of myself and a few other people who are trying to setup breeding populations of various ambystomids), but they are possible to find. Marbleds would probably be the most likly to be found in CB form, and possibly blue spotteds or jeffersons. I think you'll be hard pressed to find a CB Ambystomid.
The fire salamander that was recommend is also a good pet...though shy in comparision to a tiger. It has the same vibrant colours though, and are very hardy.
The other suggestion was to buy a newt. Spanish ribbed newts are large, friendly, and industructable! They are eating machines and quite commical to watch. I have no doubt a spanish ribbed newt could survive almost anything thta happend to it in captivity (provided you're not intentionally trying to kill it). They are quite the animals.
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Hope my opinions help,
Rob