Galaxy s2 4.4 totaly stock rom?
Did you take a look at CyanogenMod? It is not absolutely stock Google Android experience but absolutely stock AOSP (Android Open Source Project) experience. It means that all Google proprietary additions are not included (for legal reasons), but you can install them easily using a package called gApps. In the end you have something very close to a Nexus experience plus very little additions that are all useful.