Some of my favorite set ups are below...

Killstreak - Harrier / Chopper / Nuke (Domination)
Killstreak - UAV / Pred / Harrier (TDM/S&D)

Tank Time!
Primary: Aug + Grip
Secondary: Raffica + FMJ
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Slight of Hand Pro
Perk 2 - Stopping Power Pro
Perk 3 - Commando Pro


Sneaky Bastards
Primary: ACR + Red Dot + Silencer
Secondary: G18's + Akimbo + Silencer
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Bling Bling Pro
Perk 2 - Stopping Power Pro
Perk 3 - Ninja Pro


Demolition!
Primary: Scar + Grenade Launcher
Secondary: RPG x2
Equipment: c4
Special Grenade: Stun
Perk 1 - Scavenger Pro
Perk 2 - Danger Close Pro
Perk 3 - Commando Pro



Is that a Killstreak? Cause ITS GONE NOW!
Primary: M2 Machine Gun + Grip
Secondary: Stinger
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Slight of Hand Pro
Perk 2 - Cold Blooded Pro
Perk 3 - Commando Pro

UAV / Counter-UAV / Pred (When I'm not nuking)
Harrier / Chooper / Nuke (for Nukes)

Usually depends on my level/Mood:

M4A1 Rape-Fest
Primary: M4A1 + Red dot
Secondary: Varies
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Scavenger Pro
Perk 2 - Stopping Power Pro
Perk 3 - Steady Aim Pro

KAMIKAZE!
Primary: Any SMG
Secondary: Pistol with Tactical Knife
Equipment: Blast shield
Special Grenade: Stun
Perk 1 - Marathon Pro
Perk 2 - Lightweight Pro
Perk 3 - Commando Pro

GET THA CHOPPA
Primary: M4A1 + Red dot
Secondary: Stringer
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Slight of Hand Pro
Perk 2 - Cold Blooded Pro
Perk 3 - Scrambler Pro

S&D
Primary: ACR + Silencer + Red dot
Secondary: G18 + Akimbo + Silencer
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Bling Pro
Perk 2 - Cold Blooded Pro
Perk 3 - Ninja Pro

I SEE YOU
Primary: Intervention + FMJ
Secondary: Shotgun or G18 + Akimbo
Equipment: Semtex
Special Grenade: Stun
Perk 1 - Slight of Hand pro
Perk 2 - Stopping Power Pro
Perk 3 - Steady Aim Pro

There's plenty of other combos I use/used, but this is the most recent

Kill Streaks: UAV, Counter UAV, Harrier or Predator
Primary: UMP .45 Silenced
Secondary: Usp .45 Akimbo, Stinger
Equipment: Semtex/ Claymore
Perk 1: Marathon Pro
Perk 2: Cold Blooded Pro
Perk 3: Ninja Pro


Kill Streaks: Harrier, PaveLow, AC-130
Primary: CheyTac M200 Intervention
Secondary: Usp .45 Akimbo
Equpment: Claymore
Perk 1: Sleight of hand Pro
Perk 2: Stopping power Pro
Perk 3: Steady Aim Pro

Very interesting set up.. I can't live without stopping power for some reason.

Ahh i don't mind it. With Coldblooded I can sneak up on People anyways if I cant get the first shot in though I usually get killed.

That's true... I may try out a more sneakily approach, I find that cold blooded is useful just not always needed.

all u need is ump