Dual wielding Machine Pistols?, I know it's cool, but is it a good idea? Options

[lorechaser]

I'm finally back in to SR after a 2 version hiatus (Ah, SR Revised....).

I'm trying to get a handle on the new system, and I think I'm doing pretty good.

My first character is an ork gunslinger adept (though fairly different from the Archetype in the book). I decided to go with Automatics with a specialization in Machine Pistols. That seems to give me the widest set of options. I can go from a single shot with a single weapon with a +2 bonus for smartgun, through dual bursts with a reasonable chance to hit the non combat wombats, all the way down to the insanity of dual long bursts in a round.

However, my DM was fairly surprised by my choice of Machine Pistols, rather than heavy pistols. His comment was, basically, wouldn't you rather just do one big shot that you know will hit?

To me, that's the point - I have options. But I haven't played yet - this is all theory. Am I gimping myself by taking machine pistols, rather than normal pistols? Am I going to regret ever using Burst shots?

To compensate, I have the following relevant bits:

I bought Agi 5, plus Muscle Toner 2, plus Suprathyroid, for a total of 8. Then Automatics 6, spec in Machine Pistols, plus Reflex Recorder (Automatic), plus Improved ability (Automatics) rank 3, for a total of 12 with machine pistols. So that's 20 dice, which seems fairly obscene, and more than enough to split in to two pools of 10.

I've got cyberhands on both arms with gyro stabilizers, and my guns both have Gas-Vent 3.

So the actual questions:

1. Do Gyro and Gas-Vent 3 stack, to give 6 points of recoil? If so, will that cover the likely recoil for 3 init passes worth of burst or SA fire?

2. Is burst fire viable in this situation, or did I build all this simply to default to using my XM30 with both hands all the time, because my main weapons suck?

3. Did I do anything illegal in the above? I stacked a lot of mods, but it seemed like it was all legal.

4. Any further suggestions?