currently im back on newts one XxX
RLS 3.2.1
its very stable,and pretty smooth.my only real complaint thus far is my verizon doesnt work

but i havent put forth too much effort ito figuring itout yet. despite being a pretty big fan of AOSP,i find sense 4 to be very visually appleaing,despite the fast that i dont use any of the sense widgets and such.the menus,fonts,and u.i. is very nice. tho the rom is huge at 600ish mb wich does somewhat eat at me inside
ive run conrom sensed and desensed daily,as well as business sense.
my phone is important to me atr work,as i talk on it frequently on bluetooth,and often need gps,google,or the "white pages" app to find things and navigate to them.
i play with less stable roms over the weekend,but i need a stable phone at work
as for dual booting android,theres not a way to do it that i reccomend. prolly the best option if you want to be able to restore backups in an emergency is to simply become s-off,and then run a permanent recovery. when s-off,you can reflash,or restore from permanent recovery with no PC. i have had to do it a couple times