Hotone Ampero II

I never had a cortex, but did own some fender tube amplifiers back in the day. With this thing you can create stereo setups like brain may, pink floyd sounds actually sound like hiwatt, acdc sounds like acdc and deeppurple is really in rock. You can get all the sounds really easily and they really sound very good. Has another slightly cheaper unit: this one tops it.
If you are a cortex guy and can hear every hair fall, I am sure its not good enough. If you like inspiring sounds that get very close: look no further.