I thought Watts was Volts x Amps? (http://amasci.com/elect/vwatt1.html) Anyway, I recently bought an Antec and I'm quite impressed with it. I'd buy another one.
I've bought several Antec PSU's over the years and they have been great. Never had one fail on me or the people I've bought them for.(the one in my machine at the moment is over 4 years old and still delivers a nice consistent ampage on all rails)
Any of the more expensive PSU's should be ok, but as Jakg says....A cheap PSU is always a false economy. My stepbrother has been through 3 PSU's in the time I've had my trusty Antec.