it really depends on MT or OT,
if you are off tanking stormcaller/crystalforge/Gavel of Unearthed Secrets/ they all fine.
if you MT karas , you should pick up crystalforge sword and switch to sun-eater when u have a good leading threat.
if you have crystalforge sword, dont bother and wasting ur gold on stormcaller.
if you don`t judge of wisdom/lights, then it doesn`t matter what speed of weapon you are using.
my opinion for pally tanking weapons(tk/ssc):
pve:
1.crystalforge sword
2.bloodmaw
3.Fang of the Leviathan
http://www.wowhead.com/?item=30095
pvp:
s1 mace
s2 mace
s3 mace
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http://www.wowarmory.com/character-sheet.xml?r=Proudmoore&n=Sindorei