i am not sure why you personally do not like 7d but seem like 7d is not a bad option though. i have used 7d for a while and still love it even though i also have 5d mark III. as term of noise at high iso... if you carefully take your shots and choose the right exposure, then it would probably not be a problem any more. in fact, i am using 6400 on my 7d most of the time when getting in a place that is not bright enough (cannot get around, then join it). these following images are shot with iso 6400 (70-200mm IS II)
note: when using high iso, do not care about over exposure... care more about your subject imo
