I rec the 7550/800st very strongly.
I used an iFi with the song below and that EQ and an amp that say it goes to 4000mW into 16ohm....mmmmkay
. Lets lop 50% off the top and say it was sending 2000mW pushing half a pot of power into a 16 ohm set steady. All the bass tests with the SZ and countless gear I have done and I lost my hearing/loud ringing for te 1st time with those. I was pretty pissed. That is hearing damage level and I still could hear the whole song going on.
Stay away from the EX1000 unless you love to **** with amps and EQ. It is a specialty set. The 7550 will go far enough to cause temporary hearing loss and the mids are still great, Tape that vent and sub bass will baptize your basshead spirit.