Hmmm. . . I like the idea of the massive number of shots, however basing a unit off of that versus others is misleading because the others are considerably cheaper.
Now lets work out the efficiency of them with an without targetting arrays, and then we will check on the gun drones. . . I will throw in the markerlight drones as well. . . These will all be versus Marines, if I am in the mood later I will do the math for IG as well. . .
4 Basic Stealth Suit: 12 shots, BS 3, 120 points
6 hits, 4 wounds versus Marines, 1.32 kills
3 TA Stealth Suit: 9 shots, BS 4, 120 points
6 hits, 4 wounds versus Marines, 1.32 kills
3 Basic Stealth Suits and 4 Gun Drones: 9/4 shots, BS 3 and BS 2 Twin linked, 120 points
4.5/2.2 hits, 3/1.45 wounds versus Marines, 1.46 kills, 0.24 pinning tests failed
3 Basic Stealth Suits and 1 Marker Drones: 9/1 ML shot, BS 3, 120 points
0.5 networked Markerlight hits, (will use an average of the two scores), 9 shots from burst cannons, 5.25 hits, 3.465 wounds, 1.143 kills
My overall opinion is that you should probably use the maximum number of stealth suits, but if you have the extra points you might as well add in the Targetting Arrays or the Gun Drones, depending on if you expect to see alot of template weapons especially heavy flamers. . .