I actually use a Blade-Tech UCH tuckable AIWB. I have never carried appendix before, and was suprised how well this holster works. I squared off the bottom with a dremel, and it sits well.
I am waiting on my Raven Phantom from Jay. I have used these before, so I know it will be great.
Get some 13 round USP9c mags, and use them with the flat baseplate, and an X-Grip. It will give you a fullsize grip when the situation allows it.
I just had Mep night sights installed, and it completed the package.