Wierd... From everything ive seen the only power supplies that have ever had any major problems in reviews have been ultra ones. And also, ive seen really bad voltage fluctutaions on ultra power supplies insome review. If i were you id go for the SIlverstone of the Hiper, both are excellent power supplies.
Finally... ANTEC makes excellent power supplies and are among the best on the market. Now they make not be the coolest looking, but they get the job done. Ive got a 350 watt antec running a
3.4 prescott, dfi mobo, 2 hdd, 6600gt, dual dvd burners, and all the little extras. Its a superb little power supply