For those interested. On Templar's recommendation, I went through with it and purchased it. I haven't played it yet, but I'm sure it'll be worth the 25.
Thanks for the heads-up! I was at work finishing up a project and I noticed your post, so off I ran to Gamestop to pick it up. Barely made it before they closed. I initially rejected the $35.00 price tag, but at $25.00 I couldn't resist.
Can't wait to try out the new weapons. Also, how is this game better than Doom III "in every possible way"?