I'm doing the same as you, just waiting for my KW's in the mail!
I purchased the strut spreader you linked.
I also bought my HD front strut top mounts
and bearings from the site you listed.
I had to order a few bits and pieces from VW so I threw in 6 strut top bolts, and nuts for the top of the shocks as well, not sure if these come with the KW's but I don't think so.
I am changing my rear shock mounts as they were noisy as hell. I pulled them out and greased them up as a short-term fix and it's shut them up for the time being, but I would replace them if you're taking it all out. There's two different types of rear shock mounts, sports and comfort. I ordered the sports versions and bolts from here:
Rear Shock Mount (A4) - 1J0513353D - IDParts.com
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