Looks like it'll do you good. Have you considered swapping the MM/HF speeders for Typhoons? They're a little bit cheaper but I think they offer you some more punch than a MM. Those meltas are really only good at close range and with the maneuverability of the typhoons you can pretty easily get at side armor. Plus they're good at plinking marines.

Looks solid though. I honestly don't know what you'd be facing against. I haven't played a game below 2k in a long time. I forgot how they go.

 

I never really have considered using the Typhoons at all. I'll give them a try and share my results later. I mostly find a need using MM/HF against tank heavy armies, though. Thanks.