I have one that is about 13" long,not sure about the kicking ass though
mine is very shy and will only come out from under her piece of bogwood when the lights go out,i even have to put my hand in the tank and feed her fish because she is so slow at getting to the food the other fish in the tank would steal it otherwise.Bichirs are very active as juveniles but become more and more secretive as they grow,great fish though and amazing to watch feed,if you can see them
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Why wait till you get a 190g? A 75 is more than adequate to keep one in,their not the most active of fish and are not particularly fast swimmers (comical is what springs to mind),go on treat yourself and get one.