Hi,
AFAIK Denon carts go well with SME tonearms. Go for Denon DL-103 .
The Dl-103 will work in the in the SME 3009 Type II Improved (fixed headshell if I am not mistaken) tonearm that
TaureanBull has, but it is not the ideal cartridge for this arm. The Denon is low compliance and the SME 3009 Improved is a low mass arm (6.5gr mass) and not the best match at all.
There are mods/ workarounds to use the DL103 in this arm but then one would be better off getting the SME 3009 non improved version
This arm has plasic knife edge bearings and was designed for high compliance cartridges.
The DL 301 is high compliance and will work,but still not ideal.The MC carts put out a lot of energy and the plastic bearings of the improved 3009 do not handle this well.
It is best to use a high compliance MM type that this arm was designed for.
From the other posts I see that TaureanBull has shortlisted the AT 440 .This is a good cartridge and will work well.
@TaureanBull, try changing the original Thorens mat for a thicker rubber mat,or a cork mat to damp out the ringing of the TD125 platter.
I have a rubber mat from Mayware (the guys who used to make the Formula IV tonearm) and it works well.I am using it on my TD124 now.
Regards
Rajiv