hard time selecting

hi guys, so i have a budget of 140ish dollars, i have been thinking for a very long time now, my options are, the as nami, the as rep, the as kraken or the baliplus rep. my budget allows me to either buy a nami or a rep and a kraken, the problem comes with the rep, ive heard the stock hardware is terrible at least for baliplus and i do think i will invest into my rep if i do get one, but i do not know if i should get the armed shark or the baliplus rep, i want to upgrade my replicant but i also dont know if the armed shark rep will fit the real brs hardware. also anyone knows what the dimensions are for both the zen and pivot of the as rep and baliplus rep?