For MOST PEOPLE, PNY and Zotac are not AS good. Stick with the Big4 usually: Gigabyte, MSI, EVGA, ASUS.
Out of the 4 brands u chose, get the Gigabyte OR THE MSI.
Reasons to pick the MSI: Runs extremely cold and quiet
Reasons to pick the Gigabyte: Better warranty but it is noisy as heck
My recommendation: MSI and dont look back. RUnning a GTX 560 Ti Twin Frozr and I have had absolutely 0 issues with it for 3 years.