You can lead a horse to water ...
I suggested the Creative's to someone on the HDD forum. He preferred them to both HD25II and returned a set of B&W P5's. That he also owns an older STAX and wasn't dissappointed by the CAL kind of shows how good they are.
No headphone is perfect, the number of headphones most here have, pays testament to that but for around 50quid from Amazon, you get a lot for your money. You might find they are all you need and combine some of the best traits of the ones you already have. I certainly thought they absolutely trounced the much overrated M50's but thats just my personal opinion. Your mileage may vary.
If you want HD650 sound but dont fancy spending a small fortune, buy a pair of PX100's.