Black Ops PS3 - can anyone offer me something different than the famas?

hi all, i have used the famas on black ops for months now with the occasional use of the PSG1 on crisis and havana and i want to branch out but are there any weapons as good? the spectre is fairly deadly from close range but as for the rest famas is too good compared to the rest. Also, i havent hit an 11 kill streak since i unlocked an 11 killstreak (dogs). any tips on how to hit the 11 mark? any particular maps or is it simply skill? i have hit 11 a few times on firing range, crisis and havana but maps like array and hanoi i'm pretty average