This is the list I have won with the most consistantly for all you Brother Knights.
HQ
Grandmaster 145 psycannon 30 hammerhand 10 185
Elites
4 Terminators 1 psycannon 1 Bro with psycannon holocaust 274 274
4 Terminators 1 psycannon Bro with thunder hammer shield holocaust 244
Troops
6 GK 2 psycannon Justicar melta bomb targeter 231
Same 231
Fast Attack
6 GK 2 incinerators Justicar with thunder hammer 220
Heavy Support
1 dreadnaught assault cannon extra armor 115
total 1500