Okay... Blown engines and need for gauges?
I'm leaning towards supercharger because I'm a bit more careless revving, shifting, etc, and feel it's safer... Plus gauges not needed...
At 6psi, blowing an engine is not a concern. You're well within the safety margins in all aspects. In regards to gauges, if you want my honest opinion, you should be monitoring certain parameters in any forced induction application. Especially, if that application was not previously forced induction to begin with like our SSs. I run 2 gauges. An AEM water temp gauge because the idiot lights are the size of a pin head and I did not realize I had lost coolant out of a prototype part until I put my foot to the floor and the SS got really pissed off and went into limp mode. I looked down and the coolant temp light was flashing which I did not notice because it was high noon. I also run an AEM failsafe gauge which monitors boost and AFR. It also stores 2-3hrs worth of data logging. I also run my kit at 9psi so the nice thing about the failsafe is if my AFR gets to an unsafe limit, preset by me, while doing a pull it will cut boost.
@iNewton has a thread about installing gauges on the SS which is 2nd to none. It's what I used to install my failsafe. I did a couple things differently to work for me but he lays out all the wiring and where to tap into perfectly.
@jookyone also shared a template in another thread for setting up the screen on the AEM data logging software so you only see what is usable on the SS. I use that preset template for all my log analyzing.
As far as being careless revving, that's what the rev limiter is for. And so far in my experience, regardless of which route you go with forced induction, if you're still running the stock PCM and not a stand alone like the Haltech 1500, the SS tends to get a little pissed off when shifting over 7000RPMs.
The supercharger route is no more safe than the turbo route. But I'm also a turbo guy. I totally get why people like superchargers and they are really fun to drive. But these are just my personal opinions. At the end of the day, you should purchase whatever you will feel more comfortable with regardless if it is a kit from ZZP or another vendor.