Design Ideas for A custom leaning ZYNQ7000 board

[ali_asadzadeh]

Hi,
I have done several designs based on Spartan 6 devices, now I wanted to build a custom designed Board for ZYNQ7000 mainly XC7Z010 or XC7Z020, for my first design into ZYNQ, which part do you suggest? I have done DDR2 before, this is my fist time going to DDR3, how many chips and which topology do you suggest? any additional I/O's and peripherals are welcomed
Do you have any ideas to make a better opensource ZYNQ project?

[legacy]

Which EDA-CAD do you use?

[ali_asadzadeh]

of course I still love you! Altium