The bitch you're with now, you need to punch her in the face and show the bitch who's in charge.
If you go with the nice one, she's gonna try to turn you unto her bitch. After a year, all you will hear is; "Honey, please do this, honey please do that." After a year if this, you'll punch yourself in the face and wish you were still with meanie.
(Edited 18 seconds later.)
Keep the meanie, but first buy one of them killer house pets that seem to be so popular nowadays.