My 2cents worth is buy a K75 or a K1100. I think the K100 are too hot. And I have had three K100, yeah I never learn, but the K75 is smoother and the K1100 is not as hot and similar engine. Spine Lube is an all day project or a whole weekend if you have never done one
I've only owned one K100 against a half dozen K1100s, but I've always felt the K11s put out more heat.