Suggestions required for Upgrade Options!!

Hi,

I have a system with
1. Intel Core i7-3770K Quad-Core Processor 3.5 GHz 8 MB Cache
2. Intel DH67cl motherboard with 16 GB ECC Ram Samsung
3. 10 x 3 TB hard disk (seagate sv35) configured in raidz2
4. samsung 120 GB ssd cache drive attached to the pool.

I am using FreeNAS-9.2.0-RELEASE-x64.img

Now I want to upgrade the RAM to 32 GB ECC and change the motherboard as well as processor to server grades which I am still discussing with the vendors...

Suggestions required for Upgrade Options!!