So FLEXIcontent is SUPER powerful! waaaay more than my simplistic knowledge was able to manage, but much to my surprise, I opened tickets on the support forum, and ggppdk, a FLEXIcontent Core Developer, not only responded quickly, but provided so much support and assistance, even at point, restoring a corrupted file for us, that there is no reason to use any other solution. This extension is super powerful (way more than K2) and with this level of support, you can make it do and integrate with 99% of the other extensions out there. So much so in fact, that I sent a email to the 2J development team about how to integrate their gallery with FLEXIcontent, even though their own dev team told me that it could not done.
Like I said at the beginning – this extension is SUPER powerful and the support is Super Fantastic!! You simply cannot go wrong with this choice.