[Drax]

i think that a larger squad of CSMs with the IoS would serve you better at this level to be honest as those are some expensive squads you have there. but if you specifically want to keep the noise marines, perhaps you could syphon points away from the havoc squad (see below)

if you want to keep the havocs i would also switch the autocannon/heavy bolter ratio. at this level, you won't find too many vehicles, and even the heavy bolter can manage a glancing hit on rhino front armour so if you have 3 of them and one autocannon, chances are you should get the desired result anyway. possibly you could consider a normal CSM squad with a couple of plasma guns?

does the rhino only have the standard TL Bolter, or have you added a pintle mounted version as well? if not, the points are 5 out.