One stereo or two (stereo and mono) cartridges?

Dear @luis223344  :  The quality performance for play mono recordings quality performance between a stereo and a mono cartridge is not " night and day " differences and if you have two tonearms then makes more sense to me that you buy two different stereo cartridges, this is a limitless decision because the mono cartridge puts immediatly a limitation of playing alternatives in those tonearms.

As @jasonbourne52  pointed out the Umami Red is an excellent quality performer. The Dynavector top of the line is excellent too as the Colibri or the LPS.

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

https://www.audiogon.com/listings/lis981a7-benz-micro-lp-s-cartridges

It truly depends on your personality and values. It is probably breat to hear different point of views from here. But it is really you.

Personally, I can seldom listen to a mono recording… I get bored almost immediately. I loved a Fats Waller album but am so disappointed it is not in stereo. It just falls flat. Another personal thing… I want the best possible sound at all times, so I would never own two cartridges. Never.

Alternatively I have read about folks with nearly a dozen cartridges with head shells… pairing the perfect cartridge with a particular album… I am left scratching my head.

On the other hand, I shoot a Leica M10 and have been very tempted to buy a Leica M10 monochrome (only shoots monochrome… higher resolution and more gray shades). 
 

So, it comes down to you. Given your question I like the idea of splitting the investment in proportion to how much you listen to stereo versus mono. 
 

Also, from my experience if I have a $10K budget… definitely worth spending it. My cartridge is around $8.5K, definitely well worth it. 

@ghdprentice personally, I can seldom listen to a mono recording… I get bored almost immediately. I loved a Fats Waller album but am so disappointed it is not in stereo. It just falls flat

You clearly are a seasoned vinylista, but in my experience good mono is far from boring. Ymmv

@luis223344 investigate Tedeska for Mono ( and Stereo for that matter ) 

Thank you @solypsa , I researched Tedeska and they sound very committed to

and in mono in particular. That is the fun of the hobby, research for impossible... Few seem to own mono and stereo carts. Surprises me. Michael Framer was advising NOT to buy the Beatles in Mono box set if you did not own a mono cart. Obviously, he wants to help sell hardware, and advertising..., yet his article was interesting and seemed to make sense. I bought the box set nevertheless...

There are ''implicite'' and ''explicite'' premises or ''presuppositions'' . There

is also the ''theory''  that there is no ''theory independant obesrvation''.

I Iintroduced ''presupposition'' because ''theory'' is to optimistic reg. our

presuppoitions. . ''Some'' may be ''programmed'' by our upbringing . That

is learning them  with lour anguage  acquisition . Among those there are

some about ''order'' or ''sequence''.

For example if one does not own ''mono LP''s'' why should he or she need an

mono cartridge? My question is ''deduced'' from the ''fact'' that everybody

seems to own i-phones. Because the other owns them or because one

can't do without.? But I must confess not to own one. because I already

own the ordinary kind. For, say, few calls pro week those are sufficient. 

That is then my presupposition.