Nexus 5 2
Gave in and got another phone. S2 with a United Rom was great but the hardware was showing its age. I got the Nexus 5 and hardware wise its great with KitKat and set it to use ART instead. (Early ART versus Dalvik benchmarks on a Nexus 5)
Rom is still stock but while it's a great overall phone, I miss some features when I had the custom rom:
– reboot menu
– Clicking on location within Calendar automatically brought my maps up
– being able to disable mobile data from the quick menu with a long press on the mobile icon.