I would go with the Rc8be upgrades but if i was you i whould keep the carbon towers even though they dont have the extra tuning holes that the alum towers have but it will keep the weight down .
Just glue around the edges on the carbon towers with a q tip or a swab.
to prevent splitting.
The shock towers that are best are likely the RC8B.2
I think the RC8B.2 upgrade kit includes everything it should.