I've had the Denon DP-300F for some time now and feel I can now offer some insight.
The original cartridge/stylus is not very high quality. It seems too be based on the Audio-Technica AT-3600 cartridge (211 style type). The numbers are:
SPECIFICATIONS
Frequency Response 20-20,000 Hz
Channel Separation 20/15 (dB at 1 kHz/10 kHz)
Vertical Tracking Force 2.0-3.0 grams
Stylus Construction Bonded round shank
Recommended Load Impedance 47,000 ohms
Output 4.2 (mV at 1 kHz, 5 cm/sec)
Channel Balance 1.5 dB
Stylus Shape 0.4 mil. x 0.7 mil. Elliptical
Cantilever Alloy tube
Mount Half-inch
As you can see, not very impressive at all. Also this cartridge is the only one I have without gold output pins. E-gads!
But this DSN-85 (aka atn-3600) has several upgrades that will make the table sing.
The first quality replacement I got was a stylus from turntableneedles.com
http://www.turntableneedles.com/AT3600-Needle-211-DHE_p_3818.html
It's a Hyperelliptical cut diamond tip for this body style (02x07mil) and really sounds excellent. $80 and cuts the tracking weight to 1 gram.
I dug a little deeper and found maybe the best upgrade yet. It's from Jico through turntableneedles.com (or Jico directly) and it's got a Shibata tip! The 211-D-shibata comes in two favors: a $90 version with no flip-guard and colored white and a model with a flip-guard and dark blue in color, $105. It also cuts the tracking weight to .75 grams.
Super nice and the best I came up with for the DSN-85 by way of the 211 style type i.e. Audio-Technica AT3600.
http://www.turntableneedles.com/Needle-211-D-shibata_p_3718.html
Links are for reference only and help in the search for musical bliss.