Take a look in the For Sale/Trade forum. You can get a FC-PGA P3 700@933 for about $157 shipped. You already have the slotket since you have a C2 on a P3V4X. Now all you need to get is a HS&F. The Alpha P3125 can be had for $42 + $4 S&H at Phamcompunter. The total price is $206. So for $20 cheaper than PC Nut ($215 + $8 S&H = $223), you have the same setup with a better HSF.
Or go to the For Sale/Trade forum and pick up a P3125 for $35 shipped. Now you have saved yourself $30 over PC Nut, and have a better set up.
Not that I am against PC Nut. I was set to buy from them till I came across the deals above.
Of course, you could take the $20~$30 you would save and spend it to get a 700@1GHz.