I mostly play DR MM Fat Beams rounds and like their string tension which is a bit on the looser side from what I can tell. I love the sound of flats, but find them really stiff with lots more tension (at least the ones I bought). Is this what I will find across all Flats, or are there sets that string up looser? I don't want to spend a fortune trying them all to find out that's just the way they are. Any thoughts or recommendations?