Eh, why not, less than $5 for both, I had to even if I never play them, nice to have in the collection.
**EDIT**
For anyone who is thinking about it and not sure because of the age of these games. I'm doing a bit of research right now and even for DE1 it seems there is a real nice texture mod that brings it close to up to date. I already found a DX10 render mod and a real nice high def mod.
Here's a link to instructions to bring the game up to date on graphics.
http://forums.steampowered.com/forums/showthread.php?t=1235278
I'm following their steps right now, the first DL is almost 900mb... I'll post up screens when I got it up and running if I can get this done quickly.
I just got done modding it, using DX10 and it was running good, got a screen, nothing amazing but a large increase over the old graphics, now I'm going to sleep.