Would it be ok to boot Vista from this external drive?

http://www.buy.com/prod/western-digital-my-book-essential-500gb-usb-2-0-external-hard-drive/q/loc/101/202418917.html

I am going to buy the next iteration of Core 2 Duo iMac and want to run Vista, but really want it on a seperate drive.

Is this going to be too slow or what?

Thanks!

That USB connection, in and of itself, is really going to slow you down. try to find firewire

You'll find a few here:

http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?nnmm=browse&mco=C4C97952&node=home/mac_accessories/storage 

I even found one that has 1TB HD.  :) 

That USB connection, in and of itself, is really going to slow you down. try to find firewire

You'll find a few here:

http://store.apple.com/1-800-MY-APPLE/WebObjects/AppleStore.woa/wa/RSLID?nnmm=browse&mco=C4C97952&node=home/mac_accessories/storage

I even found one that has 1TB HD. :)

mike7677

Well, you mean a FireWire 800 drive, since USB 2.0 is 80Mbits faster than FireWire.

BIG difference in price. 

It's not THAT big of a difference in price considering the increase in speed:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136047
dmanrevived

Exactly, it's $40 more for much faster performance.  Even if you got the Firewire 400, I'd still use that over USB.  Firewire has better throughput and will in the end be faster. 

FireWire 800 = 800 mega BITS per second, 8 bits ber byte, so divide by 8 = 100 mega BYTES per second?

Sounds fast enough to me I guess.