This is my system :
intel 3570k
1440x900 native monitor
msi 560ti twin frozor 1 gb
win7 64 bit
8mb corsair ram
seasonic 850 gold

So if i downlowd Dawnguard (or heartfire) what possible issues will i run into perfomance wise ...CTD's stuttering are my main concerns ...gamebugs are a natural
thing i know that ...it doesnt bug me that much on that department.

So anyone that can give me a real neutral insight on the currently stabiltiy of the add ons ...your input is highly appreciated.
(PPL with [censored] up Kernel , registry cementries zillion addons m8 wanna stay out of this )

seems i used a bady bady word for my thread header ...appoligize for that ...franboi:P

With unofficial patches you will rarely have any problems. There is one bug that annoys some players with dawnguard. No possible fix was found yet - C++ library error.
Other than that. You're solid.