Which ROM/Kernel for me? 2 way call recording, VPN with VPNC, fast, no FC, no OC

[Guest plutarion]

Hi.

I will get my i9250 soon, could you tell me which would be the "best" Custom ROM for me?

Things I need in the kernel:

2-way-call recording

VPN capability, I was using VPNC Widget because of Cisco VPN at my University.

ROM needs:

fast and snappy

no force closes

no OC

good Battery useage

I am coming from ZTE Blade and Dell Streak 5. Both had Android 2.3 on them, both had Custom ROMs, but these were modded stock ROMs.

I made the experience that modded stock roms are working better than CM Roms. CM7 in that case.

Can you tell me if this is still true for the Nexus?

Would a modded stock rom fit my needs and still be better than a CM?

I had to use VPNC Widget, because I could not connect to my Universitys Wireless Lan.

Could you tell me if Android 4 is capable of connecting to a Cisco VPN without using VPNC Widget?

Thanks in Advance