at the moment I'm running my Xperia Pro with:
CyanogenMod version: 10-20130103-UNOFFICIAL-iyokan
Android version: 4.1.2
Build number: cm_iyokan-userdebug 4.1.2
I'm running it for around a year now and I'm really not satisfied with the performance and stability. Everything is really not snappy, apps take really long to load and I've to wait to use it! Using Maps or Chrome is a hell and not reliable when I need them. (Most of my apps are on SD and I don't think I'm experiencing memory problems.)
When I set up the phone last year I tried in the beginning the "newest" available Android version at that time and sticked to it. I guess this was my fault. Now I want to fix this and get finally the best performance and reliability and wanted to ask you for help. I think a downgrade is the best solution. Perhaps also to a custom and minimal rom. Do you have any suggestions what I should use? I would like to go for cyanogen again but I'm open for input. What are you using?
Thanks in advance, I'm looking forward to your suggestions.