well first of all, next time you want android get nitdroid with full 2d/3d acceleration......
now your right, multitasking on the n900 is just bannanaz, its even better than multitasking on a windows pc!!! , but that android sounded horrible, are you serious ?? downloads stop ??? 500 mb of rams my *****, i mean multitasking is so sick on the n900, that i can play a music video in youtube and the same song in the media player at the same time, its ******ed but it feels damm good to have a device capable of doing that .
and pressing the back button 20 times........ u can't even close apps.......and tons of other things ( video calling, microB, media capabilities, qwerty keyboard, chatting, and i almost forgot FULL OPEN SOURCE )
i say go back to the beast "n900", even now its still the best device out there .