Powershell: Binary Modules vs Script Modules

I'm writing a Build Process (wrapping msbuild in my module) for 350+ projects (VS 2010). This module now includes lots of Functions. Although, it is working efficently, but , I've started considering writing a Dll instead of script based module. Also because I may use Win-Forms (C#) in these dlls.

I'm Googling for the performance and other issues for both approach, but not getting sufficient info.

If anyone have experience related to this, kindly give some advice that which approach is better for PS Modules: Binary(.dll) or Script(.psm1)

Regards

Best regards Farrukh