I would think there is going to be some musicality (if thats the right word) difference when you go from a 6.5" speaker to an 8" speaker. The Icons might be out of the budget after you add the amp but maybe not. The other two are smaller speakers.

I'd be interested to hear from someone who has heard the JL 7.7's you mentioned. That's a larger speaker at a pretty good price. Also consider whether or not you are going to want to upgrade to additional speakers in the next couple years, if so, consider getting some you would like to have 4 of so you can keep these.

I don't mind my speakers not swiveling.