Plenty of reputable places... but it would really be useful to you, I
suspect, to get lists of species and cultivars suitable for your area.
I just took a quick look at the gardening section of the Clemson
extension website... lots of fruit tree suggestions for SC, but no
cherries... which strongly suggests to me that your success with
Raniers would be, um, limited. You'll also need a second cherry cultivar
to cross-pollinate Raniers... off hand, Bing and Lapin are what I
recall.
A couple of sites for you:
http://hgic.clemson.edu/
http://davesgarden.com/gwd/
