You probably aren't seeing Datafeedr widgets on your store page because your store pages are (for all intents and purposes) being displayed as your "home" page. But, not to fear. I'm sure Suffusion allows you to configure what widgets appear on the homepage. At any rate, it's just a setting and by no means the default functionality. Of course Datafeedr widgets should be viewable on store pages!
I don't have much experience with the themes you mentioned. I prefer to tweak the basic 2011 theme.
I'll be at Affiliate Summit West from tomorrow thru the 10th but Stefan will be able to handle your questions during that time.