AR ES-1 table w/AQ tonearm


Hi all,
I just inherited an AR ES-1 turntable with an Audioquest tonearm installed from a buddy. First of all, is this a decent tonearm? Is there a better alternative for not a load of money? I currently run a Pro-Ject original Xpression. Is the AR better? And lastly, I need a new belt for the AR. Is there anyone that still carries parts for the AR?
Thanks
skipper320
I am not sure on the model. Where would I find the model number. It looks like it might be a PT-9
I HAVE THE pt-9 AND THE ARM IS VERY GOOD BUT COULD BENEFIT FROM BETTER INTERNAL TONE ARM WIRE.
I HAVE MINE MOUNTED ON A LENCO L-75 MODDED TABLE AND IT IS A VERY GOOD ARM FOR THE MONEY.
AQ ALSO MADE A LOWER PRICED PT-6 ARM.
NOT SURE WHERE THE MARKINGS WOULD BE MINE CAME WITH THE BOX AND TEMPLATE.

fOR YOUR STOCK AR TABLE THE AQ IS A GOOD ARM I DONT THINK BUYING AN EXPENSIVE ARM FOR THEAT TABLE WILL YEILD ALL THAT MUCH SONIC IMPROVEMENT WITHOUT MODDING THE TABLE ITSELF
What sort of mods are available for the table? Are they cost effective and worth the money on a table as old as this?