[CentOS] RPMS's -- Standalone or From Sources?

Tue Feb 20 12:53:26 UTC 2007
Benjamin Sher <delphi123 at zebra.net>

Dear friends:

[Using the Centos 4.4 DVD)

I will spend the next few days reading the documentation for Centos/RedHat. 
But meanwhile, I would like, while reading it, to listen to my favorite radio 
programs which require RealPlayer. So, my question is simply: should I 
download the RealPlayer RPM from www.real.com or should I download it from an 
rpm repository source? While I am at, what about other programs such as 
Acrobat Reader, Java, etc.?

Thank you so much.

Benjamin