so for bell
i have used (WM 6.5 roms):
Trident's power Rom (generic version)
Mystery's Mystery Rom
da_reeseboy's 6.5 Rom (generic Rom)
scrosler 6.5 SSK 2.0 Rom (generic Rom)
DryBonz Bear Bonz Rom ( Development discontinued)
indagroove GroveRom 5 ( currently using)
All roms that i played with, ran really good, and were pretty stable.
I had no issues running bell with the current roms i played with
With more testing to come on the other wm 6.5 roms