I agree with you about the flash bangs being more debilitating. I use those on all my classes except my knifing class. Stun grenades are only effective if you can get around them since they can turn to shoot you.

I started playing a new class which Im still deciding if I like or not.

M21 sniper rifle
ACOG

Scavenger
Stopping Power
Ninja (may switch this to commando)

Its kind of a highly mobile sniper class that Ive been using on maps with medium range such as quarry and underpass. So far its working ok, still getting used to the acog scope tho. Anyone else notice the perma fucking smudge on that damn thing?