Of those, the GTX650 Ti is a great choice. Will play most games at 1080p, high settings and AA. Some of the more demanding games will need you to either drop settings or the AA, but for most you can use both.
650 Ti is the best one listed, the 560's were real good for the longest time but they're kind of phased out now. I usually only recommend the 650 Ti to people that don't have space, or a low powered PSU, because other wise the 7850 is a better deal.
If you're gonna be putting more money it, you're better off taking a GTX660. It's a bit faster than the 7850, but more importantly, you're getting FXAA, adaptive v-sync and PhysX. If you do get a 7850, you'll definitely want to pick up the 2GB version, but it's barely any saving compared to a GTX660, which has much more to offer.