You've got a TENOR Fluke, right? Standard 'C' tuning? (Not LowG?) I'll assume my guesses are right, so . . .
I like the Aquila strings myself (used them for a couple years), but lately I've been playing on the Worth strings and to me they sound as good if not better, but what I noticed was the lack of finger noise moving to the smoother finished Worth strings.
I have not personally tried the J65's, or any from that maker, so I can't give you an opinion on them. Were it me, I would try the Worth CT (clear tenor, medium tension) for now. They will be much more responsive on your Fluke than the stockers (Hilo's I think? -- whatever they are, they feel like noodles to me). If you determine later than you like an even harder feel and more volume the CH (clear tenor, harder) also, but I think the CT's on your Fluke will be plenty loud.
Have fun!