1500pts Marines with Kor'sarro

[AirHorse]

So yeah im working on getting my marine force built up to something more competitive so i can pop into the local store more and get some good games out of it. I have a number of ideas floating around but kor'sarro always seems to catch my eye.

HQ - Kor'sarro on moondrakkan

Troops - 2x Tactical marines - melta, multi-melta, combi-melta in rhino
2x Tactical marines - flamer, multi-melta, combi-flamer in rhino

Fast attack - 10x assault marines - power weapon, melta bombs

Heavy Support - 2x predator - autocannon and sponson heavy bolters, extra armour

total - 1485pts

Now the plan is for kor'sarro to join with the assault marines and outflank(theres no problems with that right? they move at the speed of the slowest model i think), tactical marines move to the enemy threats or objectives in their rhinos and the predators pop open transports for me before turning their attention to whatever else they can bring pain to. what do you reckon? I figured since i cant think of anything else to get i might chuck some melta bombs on my flamer sergeants.