I have tried both the Spice Stock and Wellcom Stock. Both stock ROMs are Gingerbread but I don't remember the exact version numbers. The ROM from Spice has the most bloatware and the Blueberry application is a battery hogger. Wellcom was pretty stable and did not give me much problems.
I rooted my phone (to adjust CPU speed and improve battery life) to MIUI (at first) and later to CM7 (from edowar, 31-12-11 release). I am quite happy with CM7 (Don't have a complaint against MIUI, but I prefer the UI of CM7). I have the odd incoming call issue but you can work around that by switching the call to speaker & back to fix.
I rooted my phone (to adjust CPU speed and improve battery life) to MIUI (at first) and later to CM7 (from edowar, 31-12-11 release). I am quite happy with CM7 (Don't have a complaint against MIUI, but I prefer the UI of CM7). I have the odd incoming call issue but you can work around that by switching the call to speaker & back to fix.