EVGA, Palit and Gigabyte have the best versions of this card it seems.
If you are interested in reviews here are the links:
http://www.guru3d.com/articles_pages/evga_geforce_gtx_780_ti_sc_acx_superclock_review,1.html
http://www.guru3d.com/articles_pages/palit_geforce_gtx_780_ti_jetstream_review,1.html
http://www.guru3d.com/articles_pages/gigabyte_geforce_gtx_780_ti_windforce_3x_review,1.html
A good point to bare in mind, the stock coolers take the air from the tip of the card a blow it out the vents on the back of the case, while custom coolers take air from the face of the card and blow it inside the case.