Thanks to all for helping me order the correct fork. Your input is much appreciated. My front fork is I believe, worse than the Suntour. My bike came with a Capa RST T7 which I believe has a tad less than 80mm of travel.

Thanks to you guys for making me skeptical of my initial choice I have decided to email Surly and ask them what would fit. Here is the text of the email:

I have a 2008 Specialized Hardrock Sport Non-Disc with a 17" frame. I want to replace the front fork (Capa RST T7) with one of your rigid forks. My LBS (S&W Sports Concord, NH) will order and install it for me, but I need to know which fork will be the correct one for my bike. Thank-you.

Hopefully I will have an answer soon.