Congratulations! Enjoy the bike. Lots of good info on the forum too for us xbones owners when your not out riding it.... Post some pics over in 'our' forum sticky once you get it home.
The flat paint is fine. I had a Nightster in black denim/grey. The paint performed well and was low maintenance. I wouldn't worry about it. Glossy is a nightmare in comparison to maintain and keep looking it's best.