I have two 92A1s, two M9A1s, and I previously owned two 90-Twos. I tried to like the 90-Two, but the grip really, really sucks. I ended up selling the 90-Two each time. I couldn't like the gun because of the grip.
There are NO aftermarket grips, and the factory grip is just too slippery. That's the biggest complaint ya see over and over about the 90-Two.
Also, there IS a replaceable "thin" grip for the gun. It's been unobtainable for over the past year - but they JUST finally hit the US shores with another batch. So, you better order one ASAP if ya ant one.
I'd suggest getting the 92A1. It has the updated features of the 90-Two, but it has the regular 92FS grip. So, ANY 92 grips will fit the gun. Also, the 92A1 comes with THREE 17 round mags.