Yeah, I've got the ABS version, XT660ZA. I love the bike, but if I could do it over I would have gone for the non-ABS version (actually, if it was today I'd go for KTM 690 Enduro R but thats a different story . ABS doesn't have adjustable front forks and only preload on the back. There are also other *stupid* things that I don't think the normal XT660Z has, like you have to remove the whole tank(!!) to get to the battery, as well as *no* space under the seat.

Other random things I can think of - suspension is harder on the ABS model, tank is slightly different so the key is quite annoying to turn and take out.

I don't know why people want bikes like this to be lower. I mean, it's an adventure bike, you'd want it to be as tall as possible, otherwise you may as well buy a tourer.