Steve...

Great choices. I just Assistant Directed/Sound Designed for a High School version of Les Miserables. We used the Allen & Heath QU-32 with 2 stage boxes (AB-168). It was going through a $78,000 Clair Brothers sound system. The Allen & Heath really did a fantastic job. We don't have the chrome version... but it is beautiful.

I used the easily assigned "custom layer" to put the slider control I needed under my fingers. I put Aux master sends (Mix on the QU), Effect master sends, and all the other mics and "ST in" on the Custom Layer. Very handy in the middle of battle.

For the Mic you picked... great choice. My wife uses the Neumann KMS 104plus. She loves the results. I use the Shure KSM8 and it does a great job without the need of phantom power.

I also use the Korg Pa4X to lead worship. I play backing tracks I created on a Motif ES7 and launch them direct from a folder on the thumb drive. We do 4-5 songs so I put a "1_Sunday Songs" on the root directory on the Pa4X thumb drive. Once selected, it always goes back to that file. Used for the last 5 weeks and it is going well. I have a piano sound selected to play on top. And I have control of the mp3 and main sound from the sliders on top of the Pa4X.

Keep going for quality, it is worth it in the end.

BTW... What eliminated the Soundcraft Si Impact? I've been looking at one of these on Sweetwater as a B-Stock for only $1799. A lot of bang for the buck! And easy for me to transport.