If you are looking to go pro, or even a full D1 college schedule, it will help the resume; just becareful because doing two many programs (high school, college, FIBA) will eventually catch up to you and the last thing you want to do is make the right call, for the wrong league in front of an observer.
Its always worth a try to go International. There aren't many international referees from US (mostly because we don't play much FIBA ball) but you can always go north of the border and do some games up there.
I did a camp a few weeks ago with a few guys from Montreal and they were telling me that this coming season, all basketball (except Mens College) will be FIBA rules.
Also to consider, there are a lot of newer Pro or Semi-Pro leagues around to do those games. Check out some of the following links:
http://www.iblhoopsonline.com/
http://www.cbahoopsonline.com/
http://www.nba.com (they are looking for D-leauge officials)