I'm looking for a medium-large sized cichlid for my 75 or 46, both of which are community tanks with rams, various small tetras, and 2 young angels(angels are in the 75). I'm trying to decide between one severum, which would go in my 75, or 2-3 keyholes, which would go in my 46. Can anyone share any experiences they've had with either of these fish? This will help me decide which one I want to keep. What color variants are the prettiest among severums, if I do choose to get one? Also, how large do keyholes get? I've read 3 in. and then almost 5 in. from several different online sources.