1500 RTT tournament Marines and Grey Knights

OK, new tournament soon, and I need your advice.

I'm working hard in an army tray (pics soon), And a box of space marine commander will arrive in order to make a new leader. Yes, I'm behind of the best army price

I'll create a background, the whole army is painted... but...

The list...

So far, this is what I want to use:

-Master of the Chapter with Boltgun, relic blade, and hellfire rounds
-Sternguard veterans x 7 (as retinue of the master)
-dreadnought
-2x10 tactical squads with plasma gun and ML (no PF, because the idea is provide fire support)
-assault squad with PF.
-2x5 devastator squads, one with 3 M.launchers, and one with 3 heavy bolters

and now, the question:

-10 PA Grey knights, with a psycannon and a flamer? is that so, I'll give a rhino to one devastator squad, so, the GK can use it.

OR

-5 GK terminators, with 2 psycannons, one of the squad, and one for the brother captain. No rhino, but 5 more assault marines instead.

of course, I can only choose one option...

any ideas?

For the Devastator Squad I think Missile Launchers + Plasma Cannons are the way forward. With both anti-tank and anti-infantry ability.

I'm not sure if Grey knights can use the rhino but if so then there best using Incinerators otherwise they'll have to stick close to the dreadnought to at least get a cover save.

with the new rules, yes, they can use the rhino.

If its a dedicated transport it can't start the game holding a unit it wasn't purchased with, however after the start can be used to transport any units.

With your list I would be more inclined to take the GKT, rather than PAGK with a veiw to use a Rhino

Go with the GKT's. You already have enough 3+ armor save boys. I agree with for the emperor in taking plasma cannons over hb's.

I also say go with the GKT's for some extra "ooomphh!!!" in CC.

OK, Brothers, I'll follow your advices.

Thanks!.