i have had 3ghz out of it but im not a big over clocker i got it too 3 but temps were a little high for my liking (poor hsf) so i clocked it back to stock.. and i havent tried on water yet, its all in perfect condition.. im sure you could get it over 3 pretty easily..
it is all stable and working... im running it right now. I also have ALL the original packaging for the RAM aswell (i think) and the E6400 heatsink un-used. The only thing i think im short of is the original anti-static bags.
Im looking to sell in maybe end of this week or next week latest... Just waiting to get paid from work.