That was a quick PT purchase, took me nearly thirty years to finally get mine
I think a few people will agree that a Mission 774 Original arm is a fantastic match for PT tables, make sure it is an Original not LC http://www.vinylengine.com/library/mission/774-%28original%29.shtml
As for cartridge, depends how far up the food chain you want to go and what your preference are in terms of sound. If you decide to go moving coil you may need the added expense of a phonostage if your amplifier doesn't support mc.
At present I am using an Audio Technica AT OC9 to great effect, some people think it is a little too forward but it seems to work well with my Musical Fidelity amps (I have 4 different 80's models) and Tannoy 611 speakers.
SatanFriendly wrote a really good post on several cartridges you may wish to consider if your budget allows. The absent OC9 is the one I now own and am very happy to have caught the bargain in time. SF is another PT owner and a wealth of information. http://www.vinylengine.com/phpBB2/viewtopic.php?t=38482
If I find myself caught between two evils I choose the one I haven't tried yet.