I switch on and off between these two builds, using these two daggers atm,
http://wow.allakhazam.com/item.html?witem=12590 and
http://wow.allakhazam.com/item.html?witem=12783
Assassination Talents (21 points)
Improved Eviscerate - 3/3 points
Increases the damage done by your Eviscerate ability by 15%.
Malice - 5/5 points
Increases your critical strike chance by 5%.
Ruthlessness - 3/3 points
Gives your finishing moves a 60% chance to add a combo point to your target.
Relentless Strikes - 1/1 points
Your finishing moves have a 20% chance per combo point to restore 25 energy.
Lethality - 5/5 points
Increases the critical strike damage bonus of your Sinister Strike, Gouge, Backstab, Ambush, Ghostly Strike, or Hemorrhage ability by 30%.
Improved Expose Armor - 3/3 points
Increases the armor reduced by your Expose Armor ability by 45%.
Cold Blood - 1/1 points
When activated, increases the critical strike chance of your next Sinister Strike, Backstab, Ambush, or Eviscerate by 100%.
Combat Talents (8 points)
Improved Gouge - 3/3 points
Increases the effect duration of your Gouge ability by 1.5 seconds.
Improved Sinister Strike - 2/2 points
Reduces the Energy cost of your Sinister Strike ability by 5 Energy.
Improved Backstab - 3/3 points
Increases the critical strike chance of your Backstab ability by 30%.
Subtlety Talents (22 points)
Camouflage - 5/5 points
Increases your speed while stealthed by 15%.
Opportunity - 5/5 points
Increases the damage dealt when striking from behind with your Backstab, Garrote, or Ambush abilities by 20%.
Improved Ambush - 3/3 points
Increases the critical strike chance of your Ambush ability by 40%.
Initiative - 5/5 points
Gives you a 75% chance to add an additional combo point to your target when using your Ambush, Garrote, or Cheap Shot ability.
Improved Sap - 3/3 points
Adds a 90% chance to return to stealth mode after using your Sap ability.
Preparation - 1/1 points
When activated, this ability immediately finishes the cooldown on your other Rogue abilities.
And:
Assassination Talents (30 points)
Improved Eviscerate - 3/3 points
Increases the damage done by your Eviscerate ability by 15%.
Malice - 5/5 points
Increases your critical strike chance by 5%.
Ruthlessness - 3/3 points
Gives your finishing moves a 60% chance to add a combo point to your target.
Lethality - 5/5 points
Increases the critical strike damage bonus of your Sinister Strike, Gouge, Backstab, Ambush, Ghostly Strike, or Hemorrhage ability by 30%.
Relentless Strikes - 1/1 points
Your finishing moves have a 20% chance per combo point to restore 25 energy.
Improved Expose Armor - 3/3 points
Increases the armor reduced by your Expose Armor ability by 45%.
Cold Blood - 1/1 points
When activated, increases the critical strike chance of your next Sinister Strike, Backstab, Ambush, or Eviscerate by 100%.
Improved Kidney Shot - 3/3 points
Reduces the cooldown of your Kidney Shot ability by 5 seconds.
Murder - 1/2 points
Increases your chance to hit while using your Sap, Ambush, Garrote, or Cheap Shot abilities by 3%.
Seal Fate - 5/5 points
Your critical strikes from abilities that add combo points have a 100% chance to add an additional combo point.
Combat Talents (21 points)
Improved Gouge - 3/3 points
Increases the effect duration of your Gouge ability by 1.5 seconds.
Lightning Reflexes - 2/5 points
Increases your Dodge chance by 2%.
Improved Backstab - 3/3 points
Increases the critical strike chance of your Backstab ability by 30%.
Deflection - 5/5 points
Increases your Parry chance by 5%.
Riposte - 1/1 points
A strike that becomes active after parrying an opponent's attack. This attack deals 150% weapon damage and disarms the target for 6 seconds.
Precision - 2/5 points
Increases your chance to hit with melee weapons by 2%.
Dagger Specialization - 5/5 points
Increases your chance to get a critical strike with Daggers by 5%.