I was just having this conversation with my brother. Essentially Hard Drives have overshot their market segment.  They consistently provide more and more storage capacity and have now exceeded the needs of their customers.  Do you really need a terabyte in your home?  Unless you are ripping your entire DVD collection (ummm...not legal right now) to your HD, you are probably fine with a couple of 120gig drives.

Enter solid state.

Quieter, more energy efficient, better I/O.

...and now you can get them up to 128gig: Toshiba to Offer 128 GB Flash Drive

done and done.