Once you go 1TB you'll never go back. I got one of those New Egg drives, life has been good.
Yeah, no kidding. About 6 months ago I bought 2 1TB drives (external for 119 each), and I now know why I needed the space. I am waiting for the 2TB hds to drop to around 160 bucks or so, and I will buy two of them, as my 2 1TB drives are 85% full.
I never thought I would need many TB of space, but once you have it you forget about space limitations and focus more on what you CAN do with your computers. Of course that is the crux, you end up using your computers in such a way that 1 or 2 TB of data space simply ISNT enough!