Well taking a Ka'Bin'Tak is stupid anyway. 2 Bin'Taks can throw alot more firepower....
The G'Vrahn OTOH doesnt need the range, its rast, maneuverable and has AJP, taking an ultraranged E-Mine is not really an advantage, id prefer 2 Bin'Tak style launchers instead of a single adnvanced one. You can alternate fire, to get the same output losing only the 30"+ range (but with AJP kinda moot) and youd have the advantage of getting double firepower for extra OOmph.
And for shipbreaker fans like me. The standard e-mine is actually more powerful. You get 2 Shortcharges instead of one. and the shipbreaker salvo is also more powerful. DOwnside is you will miss the shortcharge for a turn, but that is little issue i guess.