For past projects, I've always used GeoTrust, because of their combination of price and browser acceptance.
Today I noticed that GoDaddy, Entrust.net, and instantssl are all cheaper.
Does anyone have any experience with those three?
I.e., is there any reason I shouldn't just use a $30 per year SSL cert from GoDaddy?
Single root certificates are a better option and the RapidSSL certificate that NameCheap is selling for $10 is single root and run and signed by the same people as GeoTrust. Do go with a single root as it makes life easier.