I have found more of a use for the 220 and 800 with my Avatar cab with Neo's but the 2.5Khz has it's uses also.
Yup, that tonal review was prior to me gigging in a band situation & playing at church
I was pretty damn lost in the mix with the Epifani & Streamliner combo... but better in the living room

Streamliner & GK NEO cabs give you the cut you need when you want it but also you can bring the thunderous lows & sweet subtle uppermids\treble.
I'll miss the Epifani but the band decided pretty clearly on the GKs & playing behind my cab at church the Epifani clarity was less than the GK.
In front of the cab playing alone? The Streamliner Epifani cab combo was fantastic!
Grab the GK NEOs with the Streamliner if you feel you aren't clear in the mix. Cut the bass to 9 O'clock, dont sell the amp!