Yamaha PF-1000 vs Systemdek IIX ?

I have just purchased a PF-800, and have already got the Denon DL103. I know the two TT's are not identical but wonder if you could give further suggestions for upgrades to the Denon PF-800 combo.
Thanks.

Hi Vernonwtx.
Thank you for the help, the TT is coming with a heavy clamp so this should be a good starting point. Have you ever played with the effective mass of the tonearm/Denon, do you know what the effective mass is of the PF-1000 arm? Also any idea where to get a second headshell for the PF-800 arm? I found a link that said the ADC headshell would perhaps work FROM needledoctor
http://www.needledoctor.com/Welcome?search=adc+headshell
Turns out it is different.
Thanks again
Laurence

Thank you for all the help.
I will let you know if I stumble on a good source for the headshells .
Thanks