I agree with the comments on aquaclear and eheim filters. Very reliable. I wouldn't use anything else.
Reliable stuff in my experience:
AquaClear 500, 300
Eheim 2217, 2213 canister filters
Ebo-jager heaters
All-glass fluorescent light fixtures and light bulbs
Not so reliable:
Hydor Theo heaters (bought these when ebo-jagers weren't available from Pet Solutions, and they all ran 5-10 degree too hot. terrible)