Advice on hub firewire or usb ports?

Hi,
can anyone recommend a self powered high speed hub with more than 4 ports, ?
I need to hook up more peripherals, I need more ports for
scanner, printer, wacom tablet, external HD etc...
I don't know what is the difference about firewire or usb...or which one is faster...
Any suggestions would be greatly appreciated!
Monica

Intel Macs can boot from USB or Firewire. PowerPC OS X Macs needed Firewire drives to boot (or a lot of complex fiddling to get USB to boot). 
monick,
Take a look at The MiniStack v3, it offers a three port USB2.0 hub, and one extra FW400 and FW800 port piece (assuming you connect to the FW800 port on the iMac). It also has a bay for an SATA external hard disk of pretty much any size you could want and I'm told fits nicely on the iMac plinth under the screen.
http://eshop.macsales.com/shop/ministackv3
cheers
mrtotes

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