you could get a 1TB drive for $189:
http://www.newegg.com/Product/Produc...284-_-Homepage
put it in an external USB/FW enclosure for $45 costs more but theres a rebate):
http://www.newegg.com/Product/Produc...82E16817198004
and have sweet 1TB external goodness
--
alternatively you can use a laptop HD ike the
320GB WD Scorpio & put in an external 2.5" enclosure
like this which costs more but it's like a monster ipod ha ha ha.