Which power supply unit is ok?

please let me know that which power suppy unit should i buy for the configuration below:

Asus P5KPL-CM

processor = E8400 3.0Ghz (6MB CACHE - 1333Mhz FSB)

HDDs = 500gb sata 2 , 320 GB sata2 WD hdd , dvd writter sata , wifi pci card , 2 usb using for cellphone connect / digital camera connect / blue tooth dongle.

dont want to install a grapic card as i m not a gaming freak .

please let me know the PSU tht can work for the above configuration , i m not a brand conscious person so any unbranded one will also work for me , let me know its price too.

thanks

CoolerMaster 500W PSU (eXtreme Power). With absence of gfx card, you can go for the CoolerMaster 450/460W PSU too.

It has enough capacity left for future upgrades while comfortably running the above configuration.