I'll just update this with several more links.
Ok there are to many of these to break up so these sites look at the P4 "Northwood" (all links go straight to the reviews) :-
[H]ard OCP, VR Zone Hardware, Hot Hardware, SimHQ, Active Hardware, FiringSquad, Digit Life and SLCentral.
While these just deal with the XP 2000+ :-
amdmb, AMD Zone, HEXUS, SimHQ and Active Hardware.
And all the rest look at both :-
Anandtech, LostCiruits, Target PC, The Tech Report, Tom's Hardware, X-bit labs and Ace's Hardware.So I hope you all enjoy the read.