I could deal with a little change in the physical characteristics of the XD if they wanted to produce it in ACP.
I wouldn't think they would change the USA Action Trigger System (Ultra Safety Assurance).
I really like the way my HS2000 feels in my hand, but most 1911 .45ACP pistols feel as good or better.
The safety and firing designs of the XDs are what impress me the most.
bd