1000pt grey knights

looking at the grey knights, if i started that army i think i would make the core be this:

Total Roster Cost: 985 so far

HQ: Librarian (1#, 190 pts) + Nemesis Warding Stave + Quicksilver

Elite: Paladin Squad (5#, 315 pts)
2 Paladin + Psycannon + Halberd
2 Paladin + Halberd
1 Paladin + Demonhammer

Troops: Grey Knight Strike Squad (10#, 240 pts) + Psybolt Ammunition + 2 Psycannon
Troops: Grey Knight Strike Squad (10#, 240 pts) + Psybolt Ammunition + 2 Psycannon

i get 6 psycannons, and with quicksilver, i attack with 18 WS5 I10 on the libby and his paladin squad.

Daemonhammers in the GK squads +10 pts each. Also they die like normal marines, give them Rhino so you can stop 24" away and lay down some pain. +40? ea. Personally I'd go with a NFS on one psycannon and one regular paladin, so you have complete control over who makes what save, but that's me.