http://forum.ppcgeeks.com/cdma-tp2-u...-6-1-only.html
there's the 6.1 rom it is hands down the best for RAM,stability and multitasking.
the 6.5 roms i reccomend are the LEAD ROM i used it and its almost like the 6.1 rom, the RAM remains decent until maybe the 3rd day then ull have to soft reset, he recently made a new one which supposedly is faster and even more stable but i dont know for sure as i havent tried it. the userROM by elesbb also looks promising but if its like freezas rom ull have to install everything even EZInput and the installable EZInput only has english as a selection for SIP which could be a problem if u speak more than one language. and pretty soon im gonna release the roms im cooking as soon as i can figure out how to get one to boot. im gonna be making a 6.5 rom and a 6.1 rom with spanish versions of each.