I don't own a Stiletto. However, I played a Stage I Trident the other day for a few hours. I actually went to a Sam Ash, where they had one used. The place was empty, and they let me crank her up for quite a while. I tweaked and played the amp in many different modes & channels during that time. It was paired with a Marshall 4x12, and sounded excellent. This is what I found gave me a GREAT sound. Keep in mind, one of the best ways to get it to fatten up is to turn it up. Mesas sound good low, but much better when breathing harder. YMMV, hope it helps.
Tite Gain
Spongy (I used bold)
Tube Rectifier ( i used diode)
50 watt mode ( i used this mostly - tried 150W mode and the tone was still fat, it just pushed more air)
Gain: 12 o'clock (1:00-2:00)
Treble: 1 o'clock (more like 11:00ish)
Mid: 10 o'clock
Bass: 4 o'clock
Presence: 11 o'clock (9:00ish)
I was playing thru a ESP Eclipse with EMG 81/85's in it.
Master output was up high enough that you had to shout to be heard. You can experiment with channel output vs. master volume to see if you can stress the power section a little more.
Like I said, I don't own one. I started out with everything at noon, and worked from there. I thought it sounded pretty badass set like that, and the sales guys came up grinning in agreement. My personal opinion is that you have a fine setup as is, I wouldn't worry about getting a different cab. Tweak some more, maybe try a friends guitar w/ different pickups. Better yet, have them play while you dial in the amp.
Good luck.