I have owned numerous MC cartridges over many many years, including, at one time, the Delos, I would not call the Delos warm sounding. To my ears it leans on the analytical side of the sound spectrum.
A major thing to consider in addition to preamp matching is tonearm compatability
The cartridge needs to mate well to the the tonearm. Get this wrong and at best, you won't get the most out of your cartridge, at worst, you will have tracking error and distortion.
I don't know much about your Sansui but from what I gather it is a 70s vintage table with a typical S shaped tonearm. Although you have a $1500 budget, going up the cartridge food chain too much and you many have a cartridge too demanding to perform well in your tonearm. The Shibata sytlus on the Hana S might be too much for it. The Hana cartridges are a good choice but considier the E. Also the Benz cartridges, they are quite musical and warm sounding as well.
So consider the Hana E, Dynavector 20x or one of the AT cartridges also suggested. Denon cartidges perform best on tonearms with a lot of mass, whcih yours isn't so I'd avoid those.