Just like to point out that I've had previously owned the PS3 copy of Skyrim on PS3 but recently traded it in for a 360 copy and aquired all of the 360 DLC.

Am I going to screw up anything by finishing the Dawnguard MQ before I do anything with the Skyrim MQ? (Stopped doing the Skyrim MQ after beating 'Way of the Voice') I'm basically at the point where I'm getting the Elder Scrolls for the Dawnguard and it appears I'm going to Blackreach to get the Dragon Elder Scroll.

Also, just a random question, if I beat the DG MQ, will these Vampire attacks stop? They're too damn annoying for my taste, especially when quest givers and store owners die.