Feickert blackbird, kuzma 4 point which cartridge

I own not one but two 4Points amongst 8 arms on various tables. Couldn't disagree with Syntax' comments more . This is by far the best arm I have ever heard and I've pretty much heard them all and own a Graham , Dynavector , SME , Reed & Triplanar. Setup as Brian Walsh said, is absolutely key . I use a Uniprotractor / Uni-PS system for absolute precision in alignment and setup . The arm reacts to tiny changes in VTA / VTF and Azimuth . Full, vibrant, dynamic and absolutely stable - this arm is a work of engineering genius. I have had great luck with a ZYX Universe II , Clearaudio Goldfinger and Benz LP-S . Franc Kuzma himself loves mounting the LP-S on the arm. The Dynavector XV1-S would be a fine middle ground choice for someone who wants to traverse the analytical-lush divide with it's inherently warm yet detailed presentation.

I own nearly the same 'German artillery' with Emitter II
Exclusive instead of your Emitter I. My Basis is the so
called 'Gold version' (2010). I also own the Kuzma but
the turntable ( Stabi Reference).The Kuzma is 'armed' with
Triplanar VII and Reed 2A (on an armpod). The carts I
use at present are Benz LP 's'(mr=micro ridge), Miyabi
Standard and Magic Diamond. Those three are the best
carts I ever owned so I can recommend them all.

Titan is fantastic with 4point. Indeed every cartridge better itself with 4 point...

4point comes with a second headshell, so now i am planning to buy another cartridge. Opposite of lyra titan i, what would you suggest.. Koetsu, phasemation, miyajabe, shelter or other brands ?

For something different, consider an Allaerte. Some of these cartridges have extremely low output, so, that has to be taken into consideration. These are warm sounding cartridges that do not sound sluggish or murky.