[Q] Which is the most stable Custom ROM?

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http://forum.xda-developers.com – Hi Guys! I am a bit lost here due to the number of ROMS available for this device. My mom owns this phone, and she would love to get an update for her phone. She currently runs stock, and I was wondering which custom ROM do you think would be most stable. It doesn't have to be the best. The most important part is the stability of the ROM. My mom is nowhere near techy. She even gets lost in Facebook. So I don't want to complicate things for her during her use. She needs a custom rom with memory managment but stable. ICS would be great and all, but she can stay in Gingerbread if that is the (HowTos)