Bear in mind when a XC717 and XM719 have 17 and 19mm internal widths (XM719 is 24mm external), a DT Swiss (EX 5.1D) may be quoted as having a 28mm outer width which looks massive when its not actually that much bigger
What tyres are you hoping to run (that don't 'work' on your XC717s)?
For eg an XM719 IMO doesn't support a 2.25" Maxxis/2.5" Maxxis (they're the same volume, a 2.25" is much bigger than a 2.35", 2.4" is bigger than a 2.5"), a 2.35" Kenda, 2.3" Specialized, 2.35" Bontrager .. that well, they're fine for occasional use, but I don't think they're best compromise if you want to use them all the time. Something with a width more like 26 or 28mm (External) would be better I reckon
EDIT: just read you use 2.25" Schwalbe's, XM719s should be okay. Make sure you go for the XM719 disc's over the XM719s as they're lighter, and look better ..