Your requirements:

• I want to secure commercial transactions / to secure sensitive customer data
• Customer confidence demands that I user a known root from a stable and
  credible provider
• SSL Provider must own their own trusted root
• SSL Provider must be an Internationally recognized brand

We recommend that you use a GeoTrust Professional Level Certificate.

GeoTrust certificates are 128 / 256 bit single root SSL certificates. GeoTrust owns the root used to issue GeoTrust certificates and is already present in all popular browsers. GeoTrust issues highly trusted, Internationally accepted professional level and enterprise class certificates and are a highly respected and established WebTrust compliant security organization.

Click here to view the GeoTrust product page