Since Games workshop has already based one chapter on the knights of the crusades(Black Templars) I figured I would try with the Hospitaliers, if any of you know about them. My list is not based on fluff and is completely legal, im just right now trying to make it work as an army. Take it apart !

HQ
Reclusiarch
Terminator Armor, Powerfist
135

Elites
1 Brother Captain
4Gkt
245

Fast Attack
1 Justicar
7 Grey knights
225

1 vet assault marine w/ powerfist and teleport homer
3 assault marines
2 assault marines w/ flamers
201

Troops
8 space marines
2 space marines w/ plasma guns
drop pod
205

7 space marines
2 space marines w/plasma guns
drop pod
190

Heavy Support
Predator annihilator w/lc sponsons 145
Predator annihilator w/lc sponsons 145

41 models including vehicles
1491

Originally I had the tactical squads mounted in Rhinos but that just left too few figures on the table so I adopted drop pods to get a couple more marines