I would go for the Lyra Lydian Beta. It is a great sounding cartridge which gives a glimpse of the performance from the best available. Your current arm is a good match for the Lydian. Ina ddition with loading (aboout 100-1000 ohm) you will get a very rich, open tonal balance with great extension in the bass and treble.
Note: I used the Lydian (with 100 ohm loading) with an all ARC front end (ARC PH2, LS25, VT100 mkII)
Note: I used the Lydian (with 100 ohm loading) with an all ARC front end (ARC PH2, LS25, VT100 mkII)