XHD's are 6 leaf springs, the standard OE springs were 5 leaf and ~85 lb/in, the XHD's are 6 leaf and ~110 lb/in. I would suspect that the XHD's are fairly similar in height and spring rate to the ESPO 6 leaf springs, but of course being a different manufacturer there are no doubt some differences.
Great. Just wanted to confirm that I am probably going with 6 leaf stock height as I am keeping the 14's on for now so I don't want the 4x4 look.