check out the recommend PSU list thats pinned at the top of this forum.
also there is another list of PSU's according to how good the parts inside them supposedly are.
http://forums.overclockersclub.com/index.php?showtopic=69770dont play with a PSU. get a good one. i cant comment on your choices, however ive never heard anyone rave about how reliable or how stable a Xion or kingwin PSU is. if your willing to pay for a good PSU, drop $45 more and get something youll never ever regret buying and will last you a billion years.
http://forums.overclockersclub.com/index.php?showtopic=69770pc-power and cooling are one of the best reputed PSU's out there. try that one or perhaps a nice solid Antec PSU.