Help needed for P-III 700 (upgrading my pc)

Hi everybody.
I 've decited to upgrade my pc,and i need some info
about it. Everybody is telling me to get a P-III 700 "the
best chip by intel they say". Do i have to look up for a
specific type of this cpu? . Stepping? Slot1 or Fcpga?
Box or Oem ? Also,what m\b should i look for ?(brand)
The parts i'm going to keep from my old pc are:
Creative PCI 128,ATI Rage 3D IIC AGP 8MB,Creative
48X,Fujitsu 6,4gb udma 33,and a memory (i dont know brand) that says C 133U-333-542
Later on i'm going to try and some O\C thats why i'm asking for your help,to know if i'm starting the wright way or if i'm missing something important.
I would like to thank you all in advance for your help.

Tasos
Athens Greece

The P3 700 everyone likes is a cC0 stepping cpu.
Best to get fc-pga.
They all dont overclock well thou so you take a chance unless you buy a pre-tested chip.
www.pcnut.com and www.atacom.com
Sell some pretested and by stepping.
With prices the way they are a 1ghz cpu is not much more expensive thou.