I have a 3/4 ton and have driven an XD.
I can't see any reason to purchase an XD if you're towing anything over about 10k. If you're towing in the 6-8k range, then sure the XD can suffice.
The XD handles and rides no better than my old 2003 Dodge Ram, it has significantly less power than the Dodge (even given the power ratings are near-identical), and if you're comparing the new 3/4 tons to the XD, the XD pales in rated capacity. All for a similar price.
'07 Ram 3500 SRW- 5.9- Goerend- EFILive- WOP triple turbo- Exergy 200%- Carli suspension