Thanks for the info f1fanatic- I have done some more research too and as of now am looking to get an XCR sometime in the not too distant future. Besides the benefits you mention I like that it's been out for a while and some kinks have been worked out (unlike ACR), that you can easily change calibers and spare parts are available (unlike SCAR). The fact it's 40% cheaper then a SCAR doesn't hurt either!
Virtually everyone that HAS one loves it, the negative info appears to come from those who don't own one and speculate about it, like a potential 'issue' I saw mentioned about the barrel retention screw possibly working loose. I asked about it on ar.15.com and several owners assured me it's never been a problem for them, despite several 1000's of rounds.
I have watched several of the youtube vids and read through the XCR forum and XCR carbine forum.
It appears the closest stocking dealer is in Missouri, which is too bad, as I'd like to handle one before dropping $1500! If you pick one up PLEASE post a report and pics.