Kill Streaks?

I suggest that Crossfire implants a Kill Streak system. Whereas it can make the game more fun, enjoyable and more action-packed. They could start from 3-20? or 3-25 in COD (Except if you have hardline ;) )
Anyway, these are my killstreak suggestions:

3 kills:
UAV [Only for TDM]
Camera Spike
Night Vision Goggles
4 kills:
Wide Grenade
Thompson
M4A1-Custom Crystal
5 kills:
As suggested from a previous thread, a Thunder Clap/Thunder Grenade.
7 kills:
Counter UAV
Blast Shield
Armour to about 200
9 kills:
Sentry Gun
Motion Sensor [Not permitted in Ghost Mode, to make it fair.]
11 kills:
RPG 7
15 kills:
EMP.
25 kills:
Tactical Nuke [Unofficial]

The player should be given a list that pops up in a small screen, displaying a list of Kill Streaks are available, depending on their streak count.
If the player doesn't use their kill streaks in S&D, they will be there in the next round.

Add some opinions and what not, of what you think of these.
Feel free to add some extra Kill Streaks.

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