big girl with big boobs... have the same difficulty, loads of padded bras out there ... big boobs don't need padding and do need wider straps!!!!! I tend to go for sports bras too, found a really comfy one in M&S last year, went home, tried it on (couldn't get my scooter in the changing room) went back the next day to find it was discontinued aaaagggghhhh, have not found a decent one since
think more women need to be in control of bra manufacturing as men really are not getting it right!