I used to have a lot of fun with the old Athlon's... the lead pencil trick.. untill i melted everything in my machine.
Easiest processors are the recent ones, Q6600, Q9450/Q9550 are really simple.
I have to agree. If simplicity and shear speed make it a great overclocker my Q9550 has been my best experience.
This thing was way too simple. It took about 20 minutes to get to 3800 with a relatively inexpensive motherboard(p5e) and cooler (ACF7P). She booted at 1.30 and but to pass prime and Intel burn test I finished at 1.35 which reads as 1.32 and droops to 1.3 under load.
Basically a middle of the road proc and board with a cheap cooler and I have a 1ghz upgrade and a 1m superpi of 12.387. And this is all with c1e enabled.