kiyka, how hot is your cpu?
could it be running too hot?
whats holding you back, cpu clocks or bclock?
are you sure mem isnt holding you back either?
what psu are you using?

r1ch, stot on, thats the thing with vcore and others have it as well, though some worse and some better.
intel noticed we dont like droop and disable it, so they FORCE it no by using dynamic vid changes.. we CAN disable those, but then vid is frozen and eist becomes meaningless for those who run it, since clock reduction alone doesnt reduce power and heat production of the cpu a lot. but most of us arent running eist anyways, so that should be fine.
we should have a setting to freeze vid soon, until then, sorry for the inconvenience, you might have to run a tad higher vcore than you need to make sure vcore in idle is still high enough to be stable. but from what ive heard and seen stability actually doesnt seem to be a problem, its more of a "i can see vcore jump and drop and dont like it" thing than really limiting overclocks. correct me if im wrong though, i can push to get this fixed faster if its really causing problems.

gr8golf, about an oc guide, any i7 guide will do fine actually
id recommend to drop all multis first, then up the bclock and increase vtt
then raise the cpu multi and vcore with it, btw, i recommend keeping ht off, its really pretty much useless and only heats up your cpu, and heat is limiting i7 on air
then raise the uncore multi and bump up vtt if needed
then increase memory and bump up vdimm if needed

then polish off the whole thing and increase the chipset voltages and vtt and vcore a step more and you should have it all clocked at the max and stable
hope that helps

if you get stuck and cant get further, shoot me a pm