+1 on lewm's comment: if you want to play 'everything' you'll need a few different mono carts. (Archivists often have considerably more)
That said 'modern' monos will sound better with a modern stylii profile for many of the same reasons stereo records do.
Since you are adding an arm with removeable headshell plan on getting two carts.
(As an aside if you want to mess with SPU carts or other heavy-low compliance carts take a look at the Audiocreative Groovemaster II as well as the jelco you have in mind)
That said 'modern' monos will sound better with a modern stylii profile for many of the same reasons stereo records do.
Since you are adding an arm with removeable headshell plan on getting two carts.
(As an aside if you want to mess with SPU carts or other heavy-low compliance carts take a look at the Audiocreative Groovemaster II as well as the jelco you have in mind)