Pretty much what I've done, and I didn't start until the AoU lineup started announcing... Combination of price and design being my reason..
Cap AoU (design), Thor TDW (price), BW TWS (price and design) ... I've only double dipped IM. My Mk43 will be my modern version of him that ties in with my other Avengers, and my MkIII will be (in my mind, at least until my display situation improves) a standalone piece, justified by being an upgraded release of such an iconic piece.. There isn't much choice with Hawkeye, as he has less releases than all the others, but once my reward points from this year have all converted, I'll probably put them on him or SW if they are still available for order..