if you want stability go with the 21xxx roms energy or mighty both are great! if you want the newer builds of windows phone (23xxx) mighty full force is stable but stock looking, i never had stability issues with energy and his 23xxx roms are some of the best.
i would personally recomend mighty special edition or energy's 21xxx with cookie home tab. both come out the box with all you need and a very nice theme
but if your willing to go outside of nrgz and mighty i have been using mr.x rom for months and like better than both. also vins roms are great too.