I forgot the smiley.
![Wink ;) ;)](/styles/smilies/google/wink.png)
If I was looking for longevity I would definitely purchase a rear-projection over a plasma. There are more artifacts on a high end plasma in well under a year than there is on a low end wally world LCD at any point of its life cycle, and despite our rear-projection friends being SD they would probably still win in picture quality over the duration. Depending on what stage of its life the plasma was in, it's hard to say which would be worth more second-hand.