vcci

i recently lowered my car with star, apparently my front shocks were bad as my car would always drop quite a bit so i replaced them with Arnott. Since then i had the alignment done which helped a lot but my car feels very boaty on the freeway, could it be because of my bushings up front? last time i took my car to the dealer he said my bushings needed to be replaced but i felt he was just selling me things i dont need. If not bushings what else should i check in the suspension? seriously considering coilovers as star lowering rides like crap if i go any lower(bouncy and bottoms out), currently my car is lower than stock but not as low as i'd like it to be and its weird, sometimes it looks lower and sometimes higher. Advise anyone?