I had one power supply fail and it was replaced under a 3 year warranty.
The company your links show is Anitec. They appear to be playing fast with their name and hoping people will confuse them with Antec.
I have seen some cases that come with power supplies, but I have heard that these power supplies probably will not perform well...
I saw this case for $85 and it includes a 450W power supply (XG)
and I saw this case for $160 with a 500W power supply (Antec)
Do you guys think the Antec case power supply would be of good quality, because I think Antec makes pretty decent power supplies.