I'm scouring ebay for a used xc suspension fork to be used for racing and smoother off road rides on my hardtail. I'm interested in what people think of what I've narrowed it down to. All are in the 80-100 mm travel range. RS Sid Race, RS Duke, Fox F80 RLT, or Marzocchi Marathon SL. Any good/bad experiences with any of these or any thoughts in general are appreciated. Thanks!