I had recently had the same dilemma and chose 8030 due to stock issues.
Looking to get the 7350 sub soon, bc the 8030 are not cutting it for me.
One thing i am worrying about is that 1 sub is just 1 source of low frequencies, while the kali, while they don't go so low as 7350, they are 2 sources of low frequencies, which will probably create a better sound overall, less bass nulls, or boomy spots.
Can't compare with in-8, but i can tell that, at least w/o calibration and without a sub, they sound small, and i'd bet the kali would not have this problem (though even kali would benefit from a sub i gues), Due to their small size, they were damn easy to place in my environment, no stand needed
But the 8030, for me, have an addictive sound, i feel like moving to the couch and working from there instead. Clear, precise, just nice to my ear, in the listening position. For some reason, i get a sense that outside of the listening position sound is not that great, but probably this is more to my asymmetric room, then the speakers.