Another defeat to Grey Knights...!

So I played Rob's Grey Knights again, he has modified his list (1850pts) a bit which is now:
Draigo + 10 Paladins with 4 psycannons (all diff wound groups), banner
5 Interceptors with 1 hammer and 1(or 2?) psycannon
10 man Purifier squad with 4 psycannons, 1 hammer
3 Psyfleman Dreads
A solodin with hammer, might have had a psycannon as well

Think this is a better list since more psycannons and some movement in the interceptor squad.

I took:
Belial + 4 DW squads, all th+ss except 2 with chainfists, 4 cml's, banner in one squad
Land Raider Crusader
Land Raider
Ezekiel
1 landspeeder with tml &mm

Briefly, I deepstruck 1 squad in a corner which was a mistake as they just died, should have walked them.
The Raiders were good, delivered two assaults, one into Draigo and a combat squadded Paladin unit - but Belial and co failed (17 hammer attacks killed one paladin), and the other took out the other Paladin 5 man squad which fled. One Raider and a DW squad was still operational at the end of the game. I contested one objective and he held the other with his solodin so I lost 1-0. Ezekiel was pants, he stopped 1 psychic power (hammerhand) all game and then died to Draigo as he made a run from his wrecked Raider to Rob's objective.

So, next list I will be trying is this (1850pts):
Belial + 3 DW squads (all th+ss, 3cml), banner
3 Landraiders - 2 normal, one Crusader (extra armour)
3 landspeeders with tml and 2 with mm, one with hb

for 1750pts I will drop one speeder, the extra armour and swap one of the cml's for a hf and cf.
Nice movement, at least two units should get the charge, 4 twin-linked lascannons and 6 missiles on the board, plus 3 multi-meltas. Also another 6 missiles if I deploy out of the raiders for things like orks or tyranids where they will be coming to me.