well, i went 40 and 4 on quarry with an mp5k.
my favorite class to use is:
Killstreaks i usually use (though i change them often) care package or preditor missle, harrier, ac130.
also my killstreak is like 27. dunno what my k/d is idc about that i let my friends us my gt all the time. my cod4 one is like 2.5 though.