#2
Based on other reviews they seem to be pretty good but some people have had issues with the power supply dying after a few years ($100) to replace. If that pair has been used for some time, who knows how long it will last? One guy did make them last 7 years.
#3
Thanks lex! After more research on that power supply, I decided it wasn't a good idea cuz they are old so chances are that that cud happen anytime.