I need to replace the headset on my Giant XTC mtb, but I'm not sure which is the correct one to use. I haven't been able to identify the year for this frame either, which is complicating the problem.

The fork is a Rockshox Sid, with a 1.125 OD steerer. I *think* the headset is this one, but I'd like to get some confirmation before I order it.

Here's a photo of the frame and fork to help narrow down the year.

Thanks in advance.