Some setup advice please.

I have a WM Groovey 90 3D with a ASP FS120AR.

Now this is my first 3D and I am fully aware that the plane is WAY more capable than me, so.

Setup. With the 120 she comes out slightly nose heavy, CG is 150mm thats 10mm forward of the recomendation of 160 mm.(I have not mooved anything as yet)
Wing incidence I have set at +.5deg (I thought this would help at lower speeds, landing especialy)
Horizontal stabliser is set at 0deg.
The prop I am using at the moment is a wood 15x8. My choice is limited as I am waiting for the model shop I use to get a delivery. I have ordered 16x4 and 16x6.
I have set my contro throws at minimum to start.

She will fly on this setup, but I don't know what to expect.
Any advice would be welcome, I can change enything if required.
What change can I expect from the bigger prop size.