Stringreen - my knowledge of cartridges is very limited.
I really didn't "get into" vinyl until a couple of years ago when I rebuilt and upgraded my turn table. At that point I opted for a Denon because of it's stellar reviews and very attractive pricing.
The Denon is very good but not without it's warts - as mentioned it needs an arm with higher effective mass than most.
To accommodate that aspect I applied my own tweak to both the stock and the Soundsmith mod'd cartridge, in that I epoxy the cartridge to a brass mounting plate - a leaf out of the Zu version of the DL103
Now, not really a fair comparison, but a friend has a Van den Hul Colibri mounted on an Audiomods Series Five arm - the next model up from my own. Considering the difference in price - $600 vs $6000 - I would have to say the Soundsmith is turning in an incredibly respectable performance by comparison.
With the Zu version, you don't get the Ruby cantilever, which is Soundsmith's advantage.
The Soundsmith DL103 displays incredible control, without loosing any of the attributes the stock Denon is reknown for.
My only suggestion would be to look at cartridges that have the ruby cantilever - it will give you an indication what company it is in keeping with.
Sorry I couldn't be of more assistance, but I'm still learning myself
Regards