well i have two paintball tanks and they're pretty safe. anything could blow up, even the large pressurize system. i had my fears when i first started using the paintball, but if you're tired of diy and isnt looking to shell out a few hundred bucks paintball is my only other advice. when you want to venture into the high tech aquariums, the cost dramatically increases unless you build everything on your own. im too blonde for that lol. OR you could do a moss only tank. the results are stunning when done correctly and they require less maintenance.
the setup for the paintball canisters are pretty scary, i didnt realize how easy it was until i had assembled mine. all the materials i found locally and was prolly about $90. and if i can do it you can too, trust me. im the guy that's afraid of blowing a balloon or opening a soda can in fear of it blowing up =D