Well, I live in Seattle, but haven't played it. If you post a shot, I could tell you. Though I bet it's either Safeco Field (big, lots of exposed girders) or the EMP. (mushy and psychedelic)
Of course, I'm about to move to NJ, so I may not be able to get back to you immediately, but I will check back. (or you could just look for photos of the real ones on the net?)
Not that you can see the Needle from most places - it's small, it's not located downtown (about a mile away from the edge, really) and tends to get blocked out by buildings from downtown. Looks great up on Queen Anne Hill though. Seattle's great, wish I weren't leaving.