CMS system using PEAR ?

Hi all, I am looking at building a web based application for a client (quotation, asset management,etc...). I would like to use PEAR to give future clients the possibility to use different backends. To make things easier and develop faster, I was thinking about using a CMS system like phpNUKE, postNUKE, xoops,etc... and basically add my own modules. The problem is, I cannot find any of those based on PEAR, which I believe would be an advantage. Does anybody know or use of a system like this using PEAR ? If not, which one would you go for ? Thanks in advance, Guillaume