If you are running 1.6 then you are using and older model phone.
My advice, wipe it in recovery, then put Aphrodite Extra Pure. It is all stock except wallpaper and a good cleaning if you want it very stock. However, I would recommend the older Harmonia, as it is much better. Another choice would be Stock + Xionia.
Personally, I would put Harmonia 1.1 or 1.2(?) and leave it. Explain that it has been rooted, sped up and better battery life and leave it at that.
Sometimes you get more for a rooted and rom'd item.
Something like this...
For sale Virgin Mobile Optimus V $70
50% faster!
75% more battery!
100% more stable!