Digium vs Sangoma PRI Card

i have installed Cent OS 5.10 version on my server with scratch installation of vicidial
so, which card should i install on my server…
Digium OR Sangoma

brief with all quality of these products including voice clarity and easiest way to manage troubleshoot…

Sangoma don’t appear to provide support for the use of their cards on Asterisk, based on what people say here.

Purchasing Digium cards helps to fund the development of Asterisk.

Voice quality should not be an issue on PRI cards, although echo cancellation may be.